This appeal challenges the reasonableness of the award of attorney fees to an insured pursuant to Idaho Code § 41-1839. The insurer contends that the district court abused its discretion in awarding attorney fees in an amount consistent with the contingent fee agreement rather than in an amount based upon an hourly fee. We affirm the district court.
I. FACTS AND PROCEDURAL HISTORY
On or about August 19, 2002, Rena Parsons (Parsons) was injured in an automobile *745collision caused entirely by the negligence of another driver. The other driver had an insurance policy with liability limits of $50,000 issued by Allstate Insurance Company (Allstate). Parsons was covered by an insurance policy issued by Mutual of Enumclaw Insurance Company (Mutual of Enumclaw) and which provided $100,000 in under-insured motorist coverage.
Parsons filed suit against the other driver, and Allstate ultimately tendered the policy limits of $50,000. Mutual of Enumclaw authorized Parsons to accept that payment.
Parsons contended that her damages exceeded the limits of liability coverage under the Allstate policy. On September 21, 2004, Parsons, through her counsel, submitted a letter to Mutual of Enumclaw requesting that it pay “the amount justly due” under her underinsured motorist coverage. Her counsel did not specify an amount Parsons claimed was justly due, but simply stated that it exceeded the policy limits of the underinsured motorist coverage. A copy of Allstate’s file regarding the accident was enclosed with the letter.
Mutual of Enumclaw submitted Parsons’s medical records from the Allstate file to a corporation engaged, among other things, in the business of reviewing liability injury claims. After reviewing Parsons’s medical records, the corporation sent Mutual of Enumclaw a letter dated October 25, 2004. The primary issue addressed in that letter was whether Parsons’s surgical fusion at C5-6 and C6-7 done one week after the accident was related to the accident or to pre-existing degenerative changes. The letter stated, “It seems more difficult to make a case indicating the surgery wasn’t related to the accident than to make a case indicating it was related to the accident.” It recommended certain additional investigation, however, to be more certain that the surgery was related to the accident.
On October 26, 2004, Parsons filed this lawsuit against Mutual of Enumclaw seeking to recover “the amount justly due” under the underinsured motorist coverage together with costs and attorney fees pursuant to Idaho Code § 41-1839. Parsons served the complaint and summons the next day. On November 12, 2004, Mutual of Enumclaw tendered $60,000 to Parsons, which she accepted as the full payment of her personal injury claim under the underinsured motorist coverage.
On October 3, 2005, Parsons filed a motion seeking an award of attorney fees pursuant to Idaho Code § 41-1839. The district court awarded her attorney fees in the amount of $20,000, and Mutual of Enumclaw appealed.
II. ISSUES ON APPEAL
1. Did Parsons fail to provide an adequate proof of loss?
2. Should we revive the rule announced in Carter v. Cascade Insurance Company and hold that an insured cannot recover attorney fees under Idaho Code § 41-1839 unless there is evidence that the insurer acted unreasonably or unjustly in failing to pay the amount justly due within thirty days after receiving the proof of loss?
3. Did the district court abuse its discretion in awarding attorney fees?
4. Is Parsons entitled to an award of attorney fees on appeal?
III. ANALYSIS
Mutual of Enumclaw raises three issues on appeal. For the reasons stated below, we will not address the first two issues and will only address the third.
A. Did Parsons Fail to Provide an Adequate Proof of Loss?
Idaho Code § 41-1839(1)1 provides that an insurer is liable for attorney fees in an action brought by its insured to recover under the policy if the insurer failed to pay the amount justly due to its insured “for a period of thirty (30) days after proof of loss has been furnished as provided in such policy.” Mutual of Enumclaw alleges on appeal that the proof of loss provided it by Parsons was not sufficient to comply with Idaho Code § 41-1839(1).
*746On September 21, 2004, Parsons, through her attorney, sent a letter to Mutual of Enumclaw demanding payment of the amount justly due under Parsons’s underinsured motorist coverage. Enclosed with the letter was a copy of Parsons’s medical records that had been provided to Allstate. There is nothing in the record indicating that Mutual of Enumclaw demanded any additional information. By letter dated November 12, 2004, it tendered $60,000 to settle Parsons’s under-insured motorist claim. That letter stated, “We have based our evaluation on the documentation you provided to us and received on September 23, 2004.” In the brief submitted in opposition to Parsons’s request for an award of attorney fees, Mutual of Enumclaw, by its attorney, stated, “Ms. Parsons, through her counsel, submitted a proof of loss to the Defendant Mutual of Enumclaw (MOE) on September 21, 2004.” Now, Mutual of Enumclaw contends that Parsons did not submit a sufficient proof of loss.
Mutual of Enumclaw did not raise in the trial court the issue of whether Parsons had submitted an adequate proof of loss. “The longstanding rule of this Court is that we will not consider issues that are raised for the first time on appeal.” Murray v. Spalding, 141 Idaho 99, 101, 106 P.3d 425, 427 (2005). We have made an exception for constitutional issues if their consideration is necessary for subsequent proceedings in the case. Id. That exception does not apply here. We therefore decline to address this issue.
B. Should We Revive the Rule Announced in Carter v. Cascade Insurance Company and Hold that an Insured Cannot Recover Attorney Fees Under Idaho Code § 41-1839 Unless There Is Evidence that the Insurer Acted Unreasonably or Unjustly in Failing to Pay the Amount Justly Due within Thirty Days after Receiving the Proof of Loss?
In Carter v. Cascade Insurance Company, 92 Idaho 136, 140, 438 P.2d 566, 570 (1968), we added to Idaho Code § 41-1839 a requirement that “there must be evidence that an insurer has acted unreasonably or unjustly before a court may award attorney’s fees under I.C. § 41-1839.” Five years later in Associates Discount Corp. of Idaho v. Yosemite Insurance Co., 96 Idaho 249, 257, 526 P.2d 854, 862 (1973), we overruled that portion of the Cascade Insurance opinion because it “engrafts upon the statute a requirement which we now feel is unwarranted.” Mutual of Enumclaw asks us to revive that portion of the Cascade Insurance opinion that we overruled.
We had also engrafted another requirement upon the statute. In Anderson v. Farmers Insurance Co., 130 Idaho 755, 759, 947 P.2d 1003, 1007 (1997), we held, “Attorney fees may be awarded to an insured under I.C. § 41-1839 only when the insured had no other option other than to file suit against his or her insurer in order to recover his or her loss.” Four years ago in Martin v. State Farm Mutual Automobile Insurance Co., 138. Idaho 244, 61 P.3d 601 (2002), we disapproved that portion of Anderson because it added a requirement not contained in the statutory language. We stated in Martin:
Because there is no requirement in the statute that the plaintiff be ‘compelled’ to bring an action, our opinion stating otherwise in Anderson is inconsistent with the statute and is disapproved. A cardinal rule of statutory construction is that where a statute is plain, clear and unambiguous, courts are constrained to follow that plain meaning, and neither add to the statute or take away by judicial construction.
Id. at 247, 61 P.3d at 604.
In Martin v. State Farm Mutual Automobile Insurance Co., 138 Idaho 244, 61 P.3d 601 (2002), we held that Idaho Code § 41-1839(1) contains two requirements for *747an insured to be entitled to an award of attorney fees: (1) the insured must provide a proof of loss as required by the insurance policy; and (2) the insurer must fail to pay the amount justly due within thirty days after receipt of the proof of loss. Martin also made it clear that any argument regarding the requirements for obtaining an award of attorney fees under Idaho Code § 41-1839(1) must be based upon the wording of the statute. The issue is one of statutory construction. Arguments for additional requirements not contained in the statutory language must be made to the legislature, not this Court.
If Mutual of Enumclaw contends there should be a third requirement in the statute, it must present argument and authority showing that the statute as written contains such third requirement. It has not done so. It has not made any argument regarding the proper construction of the statutory language. It has merely asked us to revive Carter v. Cascade Insurance Company, 92 Idaho 136, 140, 438 P.2d 566, 570 (1968). We will not consider issues cited on appeal that are not supported by propositions of law, authority, or argument.” Callaghan v. Callaghan, 142 Idaho 185, 190, 125 P.3d 1061, 1066 (2005). We therefore decline to address this issue.
C. Did the District Court Abuse Its Discretion in Awarding Attorney Fees?
The only issue actually presented by this appeal is whether the district court abused its discretion in determining the amount to award in attorney fees. Because Mutual of Enumclaw did not tender the amount justly due within thirty days after receipt of the proof of loss, Parsons was entitled to an award of a reasonable attorney fee. Martin v. State Farm Mutual Automobile Insurance Co., 138 Idaho 244, 61 P.3d 601 (2002); I.C. § 41-1839. After considering the factors set forth in Rule 54(e)(3) of the Idaho Rules of Civil Procedure, the district court awarded attorney fees in the sum of $20,000. Mutual of Enumclaw contends that the award of attorney fees was unreasonable because the district court placed too much emphasis on the contingent fee agreement.
“The calculation of reasonable attorney fees is within the discretion of the trial court.” Bott v. Idaho State Bldg. Auth., 128 Idaho 580, 592, 917 P.2d 737, 749 (1996). “The burden is on the party opposing the award to demonstrate that the district court abused its discretion.” Eastern Idaho Agricultural Credit Ass’n v. Neibaur, 133 Idaho 402, 412, 987 P.2d 314, 324 (1999). To determine whether the trial court abused its discretion, we determine: (1) whether the trial court correctly perceived the issue as one of discretion; (2) whether the trial court acted within the outer boundaries of its discretion and consistently with the legal standards applicable to the specific choices available to it; and (3) whether the trial court reached its decision by an exercise of reason. Id.
“When awarding attorney’s fees, a district court must consider the applicable factors set forth in I.R.C.P. 54(e)(3) and may consider any other factor that the court deems appropriate.” Hines v. Hines, 129 Idaho 847, 855, 934 P.2d 20, 28 (1997). “Rule 54(e)(3) does not require the district court to make specific findings in the record, only to consider the stated factors in determining the amount of the fees. When considering the factors, courts need not demonstrate how they employed any of those factors in reaching an award amount.” Smith v. Mitton, 140 Idaho 893, 902, 104 P.3d 367, 376 (2004). In addition, the “court need not specifically address all of the factors contained in I.R.C.P. 54(e)(3) in writing, so long as the record clearly indicates that the court considered them all.” Boel v. Stewart Title Guar. Co., 137 Idaho 9, 16, 43 P.3d 768, 775 (2002). The record shows that in this case the district court considered all of the factors listed in Rule 54(e)(3).
Mutual of Enumclaw argues that the district court could not have adequately considered the first factor listed (“[t]he time and labor required”) because Parsons did not provide sufficiently detailed information as to that factor. Parsons’s attorney agreed to represent her for a contingent fee of one-third of the recovery. That fee covered all claims she may have arising from the motor *748vehicle collision, including both the claim against the other driver and the underinsured motorist claim against Mutual of Enumclaw. Her attorney did not keep time records, but he estimated that his firm spent a total of thirty to forty hours in representing Parsons. Mutual of Enumelaw contends that the estimate of attorney time spent in representing Parsons is insufficient because it does not break down the time between the lawsuit against the other driver and this lawsuit.
Time reasonably spent by an attorney in a lawsuit does not begin with the drafting of the complaint. Rule 11(a)(1) of the Idaho Rules of Civil Procedure requires an attorney to make a reasonable inquiry into the facts and law before filing the lawsuit. The litigation against the other driver was directly related to this lawsuit. Parsons had to recover at least the policy limits of the other driver’s liability coverage in order to have an underinsured motorist claim against Mutual of Enumelaw. The district court certainly understood that the time spent by Parsons’s attorney after filing the complaint against Mutual of Enumelaw was minimal. During argument on Parsons’s motion for attorney fees, Mutual of Enumclaw’s counsel argued that this lawsuit lasted only seventeen days and that Parsons’s counsel could not have done much more than draft the complaint. Parsons’s counsel did not dispute that.
Mutual of Enumelaw did not contend that the one-third contingent fee agreement in this case was unreasonable. As the district court noted, sometimes under a contingent fee agreement an attorney will recover more than he or she would under an hourly fee, and sometimes the attorney will recover less or nothing at all. Likewise, the attorney’s client will sometimes pay more than he or she would have paid under an hourly fee agreement, and the client will at other times pay less or nothing at all for the legal services rendered. A contingent fee agreement that was reasonable when entered into does not become unreasonable simply because in the end the attorney recovers more than he or she would have under an hourly fee contract.
The district court’s comments during the hearing show that it placed significant weight on the fact that Parsons had retained her attorney under a contingent fee agreement. The district court commented that the intent of Idaho Code § 41-1839 was to make the insured whole. That is consistent with our statement in Penrose v. Commercial Travelers Insurance Co., 75 Idaho 524, 539, 275 P.2d 969, 978 (1954), that the statute “does not provide any additional sum to go to the insured over and above that provided in the contract but attempts to prevent the sum therein provided from being diminished by expenditures for the services of an attorney.” Accord, Martin v. State Farm Mutual Automobile Insurance Co., 138 Idaho 244, 247, 61 P.3d 601, 604 (2002); Halliday v. Farmers Ins. Exchange, 89 Idaho 293, 299, 404 P.2d 634, 637 (1965).
The district court clearly understood that this was a matter of discretion, and it reached its decision by an exercise of reason. Its decision was within the outer boundaries of its discretion and consistent with the legal standards applicable to the specific choices available to it. In Brinkman v. Aid Insurance Co., 115 Idaho 346, 351, 766 P.2d 1227, 1232 (1988), we held, “An amount equal to standard contingent fees in the same locale is not an amount that is clearly erroneous.” In Young v. State Farm Mutual Automobile Insurance Co., 127 Idaho 122, 898 P.2d 53 (1995), we upheld an award that was only one-half of the contingent fee. In both cases, the amount awarded was within the discretion of the trial court. Mutual of Enumelaw has failed to show that the district court abused its discretion in awarding Parsons $20,000 in attorney fees.
D. Is Parsons Entitled to an Award of Attorney Fees on Appeal?
Parsons seeks an award of attorney fees on appeal pursuant to Idaho Code § 41-1839. She was entitled to an award of attorney fees under that statute in the trial court, and she has prevailed on the appeal challenging the reasonableness of that award. She is therefore also entitled to an award of attorney fees on appeal under Idaho Code § 41-1839. Martin v. State Farm Mutual Auto*749mobile Insurance Co., 138 Idaho 244, 61 P.3d 601 (2002); Halliday v. Farmers Ins. Exchange, 89 Idaho 293, 404 P.2d 634 (1965).
IV. CONCLUSION
We affirm the judgment of the district court and award the respondent costs on appeal, including a reasonable attorney fee.
Justice TROUT and Justice Pro Tem KIDWELL concur. Chief Justice SCHROEDER attended oral argument but did not participate in the opinion.. The statute provides:
Any insurer issuing any policy, certificate or contract of insurance, surety, guaranty or indemnity of any kind or nature whatsoever, which shall fail for a period of thirty (30) days after proof of loss has been furnished as pro-