Regional Air, Inc. v. Canal Insurance ( 2011 )


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  •                                                                       FILED
    United States Court of Appeals
    Tenth Circuit
    January 14, 2011
    PUBLISH              Elisabeth A. Shumaker
    Clerk of Court
    UNITED STATES COURT OF APPEALS
    TENTH CIRCUIT
    REGIONAL AIR, INC.,
    Plaintiff - Appellant/Cross-
    Appellee,
    v.                                                Nos. 09-6090 and 09-6101
    CANAL INSURANCE COMPANY,
    Defendant - Appellee/Cross-
    Appellant.
    Appeal from the United States District Court
    for the Western District of Oklahoma
    (D.C. No. 5:08-CV-00342-C)
    Edward W. Dzialo, Jr., Godlove, Mayhall, Dzialo, Dutcher & Erwin, Lawton,
    Oklahoma, for Plaintiff-Appellant/Cross-Appellee.
    Harris A. Phillips (Linda G. Alexander, with him on the briefs), Niemeyer,
    Alexander, Austin & Phillips, P.C., Oklahoma City, Oklahoma, for Defendant-
    Appellee/Cross-Appellant.
    Before KELLY and GORSUCH, Circuit Judges, and MELGREN *, District
    Judge.
    GORSUCH, Circuit Judge.
    *
    Honorable Eric F. Melgren, District Court Judge, District of Kansas,
    sitting by designation.
    Sometimes litigation takes so many twists and turns that, by the end of it
    all, it’s hard to tell who won and who lost. Ours is such a case. After much
    motions practice and a trial, Canal paid Regional Air just less than $60,000 for an
    insurance loss. After trial, both sides declared victory. And this led to a whole
    new fight over who won and who lost the last fight. Claiming to be the
    “prevailing party,” each side argued that Oklahoma law entitled it to recover
    attorneys’ fees, costs and, in Regional Air’s case, interest from its opponent.
    Eventually, the district court declared Regional Air the prevailing party but
    granted the company only a fraction of the fees, costs, and interest it sought. This
    result satisfied no one and both sides appealed. To resolve these competing
    appeals, and hopefully bring this collateral dispute at least a step closer to
    conclusion, we must address several questions of law, including: When should
    relief granted before trial be included within the district court’s judgment? Does
    a trial court have discretion to deny attorneys’ fees under Oklahoma’s law? When
    does a prevailing party’s entitlement to pre-verdict interest accrue? As we will
    explain, our resolution of these questions agrees in many but not all respects with
    the district court’s.
    -2-
    I
    To make sense of the parties’ current collateral litigation over attorneys’
    fees, costs, and interest, some appreciation of their underlying insurance dispute
    is required.
    Beginning then at the beginning, Canal sold Regional Air an insurance
    policy to cover several of Regional Air’s tractor trailers. For our purposes, the
    policy contained three important features. First, “[i]n the event of [a] loss,” it
    required Regional Air to “protect the covered automobile”; and to ensure this
    would be done, Canal’s policy indicated that “reasonable expenses incurred in
    affording such protection shall be deemed incurred at [Canal’s] request.” App.
    Vol. 2 at 200. Second, the policy required Regional Air to give notice of any loss
    “as soon as practicable” to Canal or its agents. Id. Third, in the event of a
    dispute about the value of a loss, the policy gave both parties the option to insist
    on an appraisal process before a neutral umpire. Id. at 201.
    In June 2001, a loss occurred when a traffic accident damaged one of
    Regional Air’s tractor trailers. In compliance with the policy, Regional Air had
    the vehicle towed to a safe location for storage. Regional Air then notified Canal
    of the wreck and Canal, after confirming coverage, forwarded the matter to its
    adjuster to handle the claim. On August 2, 2001, the adjuster sent Regional Air a
    letter offering $28,094.14 for the damage to the tractor trailer, plus $7,400 for
    towing and storage costs incurred through August 5. Id. at 202. The adjuster
    -3-
    offered to send a check for these amounts right away, if only Regional Air would
    sign and return an enclosed settlement agreement.
    It didn’t go that way. Writing to the adjuster on August 7, 2001, Regional
    Air’s president warned that the offer “does not even come close to replacing this
    equipment,” and observed that, during the time it took the adjuster to complete its
    assessment of the damage, “the clock was ticking and the storage fees have
    already exceeded $6,000.” Id. at 206. The adjuster and Regional Air went back
    and forth with more offers and more rejections, but never reached agreement.
    Finally, and after an initial skirmish in state court, the appraisal process specified
    in the parties’ contract was invoked and an umpire was called in to decide the
    dispute. In the end, the umpire awarded Regional Air $44,294.14 in total
    compensation — representing Canal’s original settlement offer of $28,094.14 for
    repairs and $7,400 for towing and storage costs, plus an additional $10,000 for
    repairs not included in Canal’s offer (less a $1,000 deductible). Id. at 207.
    Still dissatisfied, Regional Air brought this diversity suit in federal district
    court seeking damages equal to the insurance policy’s coverage limit, more than
    twice the amount of the umpire’s award. Canal responded by asking the district
    court to confirm the propriety of the appraisal award, arguing that it shouldn’t
    have to (re)litigate what had already been settled by the umpire consistent with
    the parties’ contract. With this the district court agreed, ruling that the contract
    allowed Regional Air to avoid the appraisal award (and so obtain a greater
    -4-
    amount for the damage done to its tractor trailer) only if it could prove at trial
    that the umpire’s award was a product of fraud, mistake, or misconduct. At this
    point, Canal attempted to settle the case with a new offer of $49,494.14 — the
    umpire’s appraisal award plus $5,000 — but Regional Air refused the deal. Aple.
    Supp. App. at 63.
    So the case proceeded to a jury trial. At trial, the district court found
    Regional Air’s evidence of fraud, mistake, or misconduct lacking and directed a
    verdict for Canal on the question whether the appraisal award could be undone.
    Still, there remained one question for the jury to resolve concerning storage costs.
    Though the appraisal award included $7,400 for towing and storage costs
    Regional Air incurred during a relatively short period after the accident, the
    company claimed it could prove additional storage costs incurred from December
    2001 through the date of trial. The district court allowed Regional Air to present
    this evidence and in due course the jury returned a $12,000 verdict in favor of
    Regional Air for its additional storage costs. After trial, the district court entered
    this judgment:
    Based on the evidence presented at trial, there is no legally sufficient
    evidentiary basis on which a jury could find for Plaintiff on its request to
    set aside the umpire award. Accordingly, judgment is hereby entered in
    favor of Defendant and against Plaintiff on that claim. . . . As for Plaintiff’s
    breach of contract claim for storage charges, the Court enters judgment on
    the jury’s verdict in favor of Plaintiff in the amount of $12,000.00. App.
    Vol. 1 at 63.
    -5-
    That brings us finally to the parties’ current collateral dispute. After the
    district court entered judgment ending the litigation on the merits, both sides
    declared victory. As the “prevailing party,” both Regional Air and Canal claimed
    themselves entitled to recover from the other side their attorneys’ fees, costs and,
    in Regional Air’s case, interest. The focus of this new fight was subsection (B) of
    
    Okla. Stat. tit. 36, § 3629
    , which provides that
    [i]t shall be the duty of the insurer, receiving a proof of loss, to submit a
    written offer of settlement or rejection of the claim to the insured within
    ninety (90) days of receipt of that proof of loss. Upon a judgment rendered
    to either party, costs and attorney fees shall be allowable to the prevailing
    party. For purposes of this section, the prevailing party is the insurer in
    those cases where judgment does not exceed written offer of settlement. In
    all other judgments the insured shall be the prevailing party. If the insured
    is the prevailing party, the court in rendering judgment shall add interest on
    the verdict at the rate of fifteen percent (15%) per year from the date the
    loss was payable pursuant to the provisions of the contract to the date of
    the verdict. This provision shall not apply to uninsured motorist coverage.
    For its part, and no doubt with an eye on § 3629’s use of the word “judgment,”
    Regional Air also filed a motion to amend the judgment, asking the district court
    to make clear(er) Regional Air’s entitlement to recover not just the $12,000 in
    storage fees awarded by the jury but also the $44,494.14 Canal owed by virtue of
    the confirmed appraisal award.
    The district court resolved the parties’ competing motions in three orders
    entered on April 1 and 17, 2009. As an initial matter, the district court denied
    Regional Air’s motion to amend the judgment. The court then proceeded to hold
    Regional Air was, nonetheless, the prevailing party. But this status turned out to
    -6-
    be of little benefit to Regional Air: the district court declined to award it any
    attorneys’ fees or costs. On the question of interest, the district court held that
    Regional Air could recover pre-verdict interest on the jury’s $12,000 award for
    storage costs — but that it was entitled to no such interest on the appraisal award
    confirmed before trial. Finally, the court held that Regional Air’s interest on its
    storage costs began to accrue from the “date of loss,” namely June 2001.
    II
    Between Regional Air’s appeal and Canal’s cross-appeal, the parties have
    asked to overturn most every aspect of the district court’s post-judgment orders.
    For example, Regional Air argues that, while the district court correctly
    determined that it was the prevailing party, the court erred by denying attorneys’
    fees and costs and by awarding too little interest. In Regional Air’s estimation,
    the district court also abused its discretion when it refused to amend the judgment
    to include the amount of Regional Air’s appraisal award. In turn, Canal submits
    that it, not Regional Air, is the real prevailing party due attorneys’ fees and costs.
    And even if Regional Air is the prevailing party, Canal argues, the district court
    should not have awarded Regional Air any interest, or at least not interest dating
    all the way back to June 2001.
    A
    To answer the question who prevailed — Regional Air or Canal — we must
    first evaluate Regional Air’s challenge to the district court’s judgment. That’s
    -7-
    because 
    Okla. Stat. tit. 36, § 3629
    (B) expressly hinges the prevailing party
    determination on what is and isn’t in the “judgment.” The statute tells us that if
    the judgment doesn’t exceed the insurer’s written offer of settlement, the insurer
    is the prevailing party; otherwise, the insured is.
    Before the district court, Regional Air filed a motion to amend the
    judgment to reflect not just the jury’s $12,000 storage cost award but also the
    $44,494.14 appraisal award. Regional Air did this surely recognizing that, only
    by aggregating these amounts could the court’s judgment exceed Canal’s final
    written settlement offer of $49,494.14 and so render Regional Air the prevailing
    party. See Oulds v. Principal Mut. Life Ins. Co., 
    6 F.3d 1431
    , 1446 (10th Cir.
    1993) (noting that, when determining the prevailing party for purposes of
    § 3629(B), we compare the judgment to the highest settlement offer made by the
    insurer, whenever made). For its part the district court denied Regional Air’s
    motion to amend, reasoning that “[w]hile [Regional Air] is entitled to recover the
    amount of the appraisal award, that fact is by operation of the terms of the
    contract and not the action pursued before the Court.” App. Vol. 1 at 107.
    We review a district court’s disposition of a motion to amend the judgment
    for abuse of discretion. See Barber ex rel. Barber v. Colo. Dep’t of Revenue, 
    562 F.3d 1222
    , 1228 (10th Cir. 2009). This standard of review recognizes that the
    question before the district court implicates a degree of judgment, invests the
    district court with a degree of discretion in resolving it, and bars us from simply
    -8-
    substituting our own discretion for the district court’s. At the same time, a
    prejudicial error of law is never discretionary and so always a basis for reversal
    under the abuse of discretion standard of review. See Valley Forge Ins. Co. v.
    Health Care Mgmt., 
    616 F.3d 1086
    , 1096 (10th Cir. 2010).
    Such an error of law occurred here. Rule 54(c) of the Federal Rules of
    Civil Procedure directs that “[e]very [non-default] final judgment should grant the
    relief to which each party is entitled.” While most stages of litigation provide an
    opportunity for at least a little bit of contention, once a court determines what
    relief the parties are entitled to, what gets included in the judgment is not up for
    grabs. As a matter of law, the district court’s judgment must grant the relief —
    no more, no less, and nothing else — that the court has determined the parties are
    entitled to. See Carter Oil Co. v. McCasland, 
    190 F.2d 887
    , 892 (10th Cir. 1951)
    (“Under Rule 54(c) . . . it is the duty of the court to grant the relief to which a
    party is entitled . . . .”); 10 Charles Alan Wright, Arthur R. Miller, Mary Kay
    Kane, Fed. Prac. & Proc. § 2664 (3d ed. 1998). And by the end of the merits
    litigation in this case, the district court had found Regional Air entitled to two
    forms of relief: 1) for the damage done to the tractor trailer and early storage
    costs, Regional Air was entitled to the umpire’s appraisal award (no more, no
    less); and 2) for additional storage costs incurred after December 2001, the
    company was entitled to the $12,000 awarded by the jury. Both these forms of
    relief should have been reflected in the court’s final judgment as a matter of law.
    -9-
    Admittedly, Regional Air set out — and failed — to win more. Regional
    Air sought to undo the umpire’s award by showing that the award was induced by
    fraud, mistake, or misconduct, and the company’s showing failed utterly on that
    front. But none of this alters the fact that the district court’s orders were clear
    and unequivocal in holding that, unless the company could show fraud, mistake,
    or misconduct, the umpire’s award was the relief (and the only relief) to which
    Regional Air was lawfully entitled for the damage done to its tractor trailer and
    for its early storage costs. The company was entitled to a judgment reflecting that
    fact.
    The district court’s § 3629 analysis illustrates our point. After having held
    that the appraisal award should not be part of the judgment, the district court
    proceeded to declare Regional Air the prevailing party under § 3629. Yet, the
    district court could find Regional Air the prevailing party only by aggregating the
    appraisal award with the storage costs verdict. (Without doing so, Regional Air’s
    recovery would have been less than Canal’s final written settlement offer, making
    Canal the prevailing party.) We agree with the course the district court took in
    its § 3629 analysis, aggregating Regional Air’s two awards. But that course
    illustrates how the district court erred in refusing to amend the judgment. When
    conducting a § 3629 prevailing party inquiry, a court is limited by statute to
    comparing the insurer’s settlement offer against the judgment achieved by the
    insured. In its § 3629 analysis, the district court appeared implicitly to consider
    - 10 -
    the appraisal award part of its judgment. And what the court implicitly
    recognized in its § 3629 analysis should have also been recognized explicitly in
    its judgment.
    B
    With a proper judgment for Regional Air — one reflecting both the
    $44,494.14 appraisal award and the $12,000 verdict for storage charges — the
    question who prevailed for purposes of § 3629 becomes straightforward:
    Regional Air received a judgment for $56,494.14; this is more than Canal’s
    highest settlement offer of $49,494.14; thus, Regional Air is the prevailing party,
    just as the district court concluded.
    Of course, Canal disputes this, suggesting that it is the true prevailing
    party. To reach the conclusion it does, however, Canal must (and must ask us to)
    split in two the relief Regional Air won. According to Canal, Regional Air’s
    claim for storage costs under the insurance policy is “entirely separate” from its
    claim under the policy for the loss of the truck itself. Aple. Br. at 17. Under
    Canal’s theory, the $49,494.14 pre-trial settlement offer should be measured
    against only the $44,494.14 portion of the judgment enforcing the appraisal award
    — and thus Canal, not Regional Air, should be deemed the prevailing party.
    We cannot agree. Whatever other problems may attend this theory (and
    Regional Air purports to identify many), it rests on a clearly mistaken premise.
    The amounts Regional Air recovered — the $44,494.14 appraisal award and the
    - 11 -
    $12,000 for storage charges — all flow from a single breach of contract claim.
    Indeed, the umpire’s contract award, on which Canal based its own settlement
    offer, itself included a component for storage costs incurred early on; the jury’s
    verdict simply brought these storage costs forward, recognizing that more such
    costs had been incurred (and were due under the contract’s terms) while this
    dispute lingered. The appraisal and storage amounts, thus, are merely different
    components of the damages that Regional Air claimed and won under a single
    breach of contract cause of action.
    C
    The next question thus becomes what relief Regional Air is entitled to as
    the prevailing party under § 3629. We begin with the question of attorneys’ fees
    and costs. The district court cited two reasons for denying any fees or costs to
    Regional Air. Regional Air challenges both rationales, and so we consider each
    in turn.
    1
    The district court first held that “[t]he plain language of § 3629 requires the
    insured to submit a proof of loss” as a precondition to recovery of any fees or
    costs. App. Vol. 1 at 112. In the district court’s view, Regional Air never
    submitted to Canal a proof of loss for storage fees. Given this “absence of a
    proof of loss for the storage charges,” the court held, Regional Air forfeited its
    statutory entitlement to attorneys’ fees and costs. Id.
    - 12 -
    This analysis rests on a legal error. As an initial matter, and while there
    are no doubt strong arguments for the district court’s statutory interpretation, so
    far we have only assumed (without committing to) the view that a proof of loss is
    an essential precondition to recovery under § 3629. See Stauth v. Nat’l Union
    Fire Ins. Co., 
    236 F.3d 1260
    , 1265 (10th Cir. 2001); Murray v. First Marine Ins.
    Co., 29 F. App’x 503, 505-06 (10th Cir. 2002) (unpublished). But we have
    expressly held that if a proof of loss is a predicate to recovery under § 3629, it is
    a requirement easily met: an insured need only provide the kind of notice its
    policy requires for receiving coverage. See Stauth, 
    236 F.3d at 1262, 1265
    (“[T]he terms of the [policy] compel[] the conclusion that . . . notification . . . of
    the existence of the [potential liabilities] would be all that was necessary to
    satisfy a ‘proof of loss’ requirement.”). So what sounds like a looming
    requirement for proof is actually just a matter of providing notice of a loss in a
    manner that complies with the contract’s terms. Or, as the Oklahoma Court of
    Civil Appeals put it: “Section 3629 is triggered by notice from an insured
    claiming to have a covered loss.” See Ass’n of Cnty. Comm’rs v. Nat’l Am. Ins.
    Co, 
    116 P.3d 206
    , 211 (Okla. Civ. App. 2005) (emphasis added and internal
    quotation omitted).
    The undisputed facts show Regional Air provided Canal with such notice.
    The parties’ insurance policy required Regional Air to give Canal notice “as soon
    as practicable” in the event of damage to the insured equipment. The policy also
    - 13 -
    required Regional Air to store the damaged equipment, and expressly provided
    that Canal would reimburse the expenses Regional Air incurred in doing so.
    Thus, as soon as Regional Air reported the accident, Canal should’ve known that
    Regional Air was incurring storage costs — and that those costs were Canal’s
    responsibility. What’s more, it’s apparent that Canal did know Regional Air was
    incurring storage costs. In its August 2, 2001 letter, Canal’s adjuster offered
    $7,400 for “wrecker service and storage charges.” App. Vol. 2 at 202 (emphasis
    added). And when Regional Air rejected that offer a few days later, it warned the
    adjuster that “the clock was ticking and the storage fees have already exceeded
    $6,000.” 
    Id. at 206
     (emphasis added). Canal thus had abundant notice that
    Regional Air was incurring storage costs and expected Canal to pay them. As a
    matter of law, this notice satisfied any proof of loss requirement found in § 3629
    (if one exists at all). See Stauth, 
    236 F.3d at 1266
    ; Ass’n of Cnty. Comm’rs, 
    116 P.3d at 211
    . 1
    1
    To be sure, Canal’s policy additionally required Regional Air to file at a
    later date, “within 91 days after loss, [a] sworn proof of loss in such form and
    including such information as the company may reasonably require.” App. Vol. 2
    at 200. But the policy defines “loss” as “direct and accidental loss or damage.”
    
    Id.
     Therefore, by the policy’s own terms, this additional requirement did not
    apply to consequential expenses incurred at Canal’s request — such as the storage
    charges at issue here. What’s more, Canal may have waived the proof of loss
    requirement by submitting Regional Air’s claim to an arbitration process and
    seeking to use that arbitration as a defense in court. See Milwaukee Mech. Ins.
    Co. v. Sewell, 
    168 P. 660
    , 664 (Okla. 1916).
    - 14 -
    2
    The district court offered a second rationale for denying Regional Air
    attorneys’ fees and costs, holding that any such award would not be “reasonable.”
    App. Vol. 1 at 112. Here again, and again as a matter of law, we cannot agree.
    Section 3629 says “costs and attorney fees shall be allowable to the prevailing
    party” (emphasis added). Applying this plain language, we and Oklahoma courts
    have said that, once a litigant establishes itself as a prevailing party under § 3629,
    an award of attorneys’ fees and costs must follow. See Stauth, 
    236 F.3d at 1267
    ;
    Shadoan v. Liberty Mut. Fire Ins. Co., 
    894 P.2d 1140
    , 1143-44 (Okla. Civ. App.
    1994). To be sure, a district court retains discretion to “determine the proper
    amount of an attorney fee [and cost] award,” but it does not retain discretion
    whether to issue an award. Shadoan, 894 P.2d at 1144 (emphasis added). The
    Oklahoma legislature left courts with no wiggle room on that score, and we may
    not revisit or revise that legislative judgment.
    Because neither of the district court’s rationales for denying attorneys’ fees
    and costs remains standing, we must remand this matter to the district court for a
    determination of what amount of attorneys’ fees and costs (and for what work —
    whether in the district court or here) Canal owes Regional Air. In doing so, we
    express no judgment on what the outcome of its proceedings may be. We do not,
    for example, pass on the question whether cost awards are, in a federal diversity
    action, governed by Oklahoma’s statute or by the federal rules of civil procedure,
    - 15 -
    or what amount of attorneys’ fees would be “reasonable” under Oklahoma law.
    Cf. Oulds, 
    6 F.3d at 1445
     (holding that at least § 3629’s attorneys’ fees provision
    applies in federal diversity actions). Those are questions entrusted to the district
    court in the first instance. We may and do hold only that the two rationales
    offered by the district court for denying fees and costs to date cannot be sustained
    as a matter of law.
    D
    Remaining before us still is the question what interest Regional Air should
    receive as the prevailing party. Section 3629 directs the trial court to “add
    interest on the verdict at the rate of fifteen percent (15%) per year from the date
    the loss was payable pursuant to the provisions of the contract to the date of the
    verdict.” See also McNickle v. Bankers Life & Cas. Co., 
    888 F.2d 678
    , 680 (10th
    Cir. 1989) (holding that, in a diversity case like this, “[t]he issue of possible
    entitlement to prejudgment interest is governed by state law”). The district court
    interpreted § 3629’s language as requiring it to award interest on Regional Air’s
    storage costs — but not its appraisal award. The court then proceeded to hold
    that interest should run from “the date of loss,” presumably meaning the date of
    the accident in June 2001. App. Vol. 1 at 113. Before us, both parties again take
    issue with both aspects of the district court’s disposition.
    - 16 -
    1
    Regional Air protests that it is entitled as a matter of law to interest on both
    the storage costs verdict and its appraisal award. In effect, Regional Air asks for
    interest on all the relief properly included in the judgment.
    We cannot oblige. As we’ve discussed, § 3629 directs our attention to the
    judgment when it comes to assessing who qualifies as the prevailing party. See
    infra Part II.A. But when it comes to the different question how much interest to
    award the now-identified prevailing party, the statute instructs us to award
    interest not on the judgment but “on the verdict.” A verdict, of course, is “[t]he
    decision of a jury . . . upon an issue which has been submitted to their judgment.”
    19 Oxford English Dictionary 533 (2d ed. 1989); see also Black’s Law Dictionary
    1592 (Deluxe 8th ed. 2004) (“A jury’s finding or decision on the factual issues of
    a case.”). Thus, by operation of the plain terms of the statute, the district court’s
    chosen course was the correct one.
    Confirming this conclusion is the fact that throughout § 3629 the Oklahoma
    legislature juxtaposed the word “verdict” with use of the word “judgment” — a
    broader term embracing all final determinations of rights, however obtained. See
    Black’s Law Dictionary at 858. Where, as here, a legislature uses different terms
    in the very same statutory provision, we take cognizance of that choice by
    presuming the legislature intended the different words to carry with them (their
    traditional) different meanings. See, e.g., Russello v. United States, 
    464 U.S. 16
    ,
    - 17 -
    23 (1983); Anderson v. United Tel. Co. of Kan., 
    933 F.2d 1500
    , 1502-03 (10th
    Cir. 1991).
    To all this, Regional Air responds by questioning the soundness of a policy
    that allows interest on amounts won only through verdicts and not through other
    means. We can, however, imagine at least plausible reasons why the Oklahoma
    legislature might have wished, as a matter of policy, to give special solicitude to
    amounts won through verdicts (in recognition of the extra amount of time and
    effort usually required to achieve them, for example). And much more
    importantly than any of this is the fact that no policy argument about what the law
    should be can suffice to establish that the district court erred in reading the law as
    it is. Of course the Oklahoma legislature could have provided for interest on the
    judgment rather than on the verdict. But that’s not what the legislature did. If
    Oklahoma’s law is to be changed to provide for interest on judgments rather than
    on verdicts based on policy considerations, that job belongs to the properly
    authorized Oklahoma state authorities, not to this federal court sitting in diversity.
    See Valley Forge Ins. Co., 
    616 F.3d at 1098
    ; Russo v. Ballard Med. Prods., 
    550 F.3d 1004
    , 1023 (10th Cir. 2008).
    - 18 -
    2
    Not to be outdone, Canal also asks us to reverse the district court’s award
    of interest. Its argument proceeds in two steps. First, Canal says we should
    imply in § 3629 a rule that interest may be awarded only from the date a
    plaintiff’s claim becomes “certain or capable of being made certain by
    calculation.” Aple. Br. at 22 (internal quotation omitted). Second, Canal
    submits, such certainty was lacking here until the amount of Regional Air’s
    entitlement was “judicially determined,” presumably by virtue of the district
    court’s final judgment. Id. To resolve this argument, we need not decide whether
    Canal’s first premise has any merit because the second premise is plainly faulty.
    Regional Air’s storage costs were always readily ascertainable by calculation; as
    the trial transcript demonstrates, all that was needed to figure them out precisely
    was the monthly storage bill and a multiplication table.
    Retreating, Canal pursues a separate argument for reducing, but not
    eliminating, Regional Air’s interest award. Here Canal gains more traction.
    Canal points out that the district court awarded interest starting from the “date of
    loss,” and so apparently from the date of the accident in June 2001. But storage
    costs accrue a day (or month) at a time, and, under § 3629, interest runs “from the
    date the loss was payable pursuant to the provisions of the contract.” Interest
    does not run, as the district court held, from the “date of loss.” Indeed, such a
    result would risk affording a party like Regional Air interest on amounts even
    - 19 -
    before they were actually incurred, a result the plain language of § 3629 is clearly
    aimed at avoiding. We thus must vacate the district court’s interest award and
    remand this matter for the court to recalculate its award starting from the date or
    dates Regional Air’s storage cost losses reflected in the verdict were payable
    pursuant to the provisions of the parties’ contract.
    ***
    By way of summary, we hold that the district court erred by failing to
    amend the judgment, that its rationales for denying attorneys’ fees and costs were
    legally erroneous, and that it failed to employ the appropriate date for the accrual
    of the interest due to Regional Air for purposes of Oklahoma’s statute. At the
    same time, we uphold the district court’s determination that Regional Air was the
    prevailing party and that it was entitled to interest on the verdict. The district
    court’s April 1 and 17, 2009 orders are vacated and this matter is remanded for
    further proceedings consistent with this opinion.
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