SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)

12 Months Ended

Dec. 31, 2016

Organization, Consolidation and Presentation of Financial Statements [Abstract]

The accompanying Consolidated Financial Statements include United Fire and its wholly owned subsidiaries: United Fire & Casualty Company, United Real Estate Holdings Company, LLC, United Life Insurance Company ("United Life"), Addison Insurance Company, Lafayette Insurance Company, United Fire & Indemnity Company, United Fire Lloyds, UFG Specialty Insurance Company, Financial Pacific Insurance Company, Franklin Insurance Company, Mercer Insurance Company, and Mercer Insurance Company of New Jersey, Inc.

United Fire Lloyds, an affiliate of United Fire & Indemnity Company, is organized as a Texas Lloyds plan, which is an aggregation of underwriters who, under a common name, engage in the business of insurance through a corporate attorney-in-fact. United Fire Lloyds is financially and operationally controlled by United Fire & Indemnity Company, its corporate attorney-in-fact, pursuant to three types of agreements: trust agreements between United Fire & Indemnity Company and certain individuals who agree to serve as trustees; articles of agreement among the trustees who agree to act as underwriters to establish how the Lloyds plan will be operated; and powers of attorney from each of the underwriters appointing a corporate attorney-in-fact, who is authorized to operate the Lloyds plan. Because United Fire & Indemnity Company can name the trustees, the Lloyds plan is perpetual, subject only to United Fire & Indemnity Company's desire to terminate it.

United Fire & Indemnity Company provides all of the statutory capital necessary for the formation of the Lloyds plan by contributing capital to each of the trustees. The trust agreements require the trustees to become underwriters of the Lloyds plan, to contribute the capital to the Lloyds plan, to sign the articles of agreement and to appoint the attorney-in-fact. The trust agreements also require the trustees to pay to United Fire & Indemnity Company all of the profits and benefits received by the trustees as underwriters of the Lloyds plan, which means that United Fire & Indemnity Company has the right to receive 100 percent of the gains and profits from the Lloyds plan. The trustees serve at the pleasure of United Fire & Indemnity Company, which may remove a trustee and replace that trustee at any time. Termination of a trustee must be accompanied by the resignation of the trustee as an underwriter, so that the trustee can obtain the capital contribution from the Lloyds plan to reimburse United Fire & Indemnity Company. By retaining the ability to terminate trustees, United Fire & Indemnity Company possesses the ability to name and remove the underwriters.

United Real Estate Holdings, LLC, formed in 2013, is a wholly owned subsidiary of United Fire & Casualty Company and is organized as an Iowa limited liability corporation, an unincorporated association formed for the purpose of holding United Fire & Casualty Company's ownership in commercial real estate.

In 2015, the Company dissolved three of its holding companies in order to flatten our organizational chart. The companies dissolved were American Indemnity Financial Corporation, Mercer Insurance Group, Inc. and Financial Pacific Insurance Group, Inc. In addition, Texas General Indemnity Company was renamed UFG Specialty Insurance Company on July 1, 2015.

Basis of Presentation

The accompanying Consolidated Financial Statements have been prepared on the basis of U.S. generally accepted accounting principles ("GAAP"), which differ in some respects from those followed in preparing our statutory reports to insurance regulatory authorities. Our stand-alone subsidiary financial statements submitted to insurance regulatory authorities are presented on the basis of accounting practices prescribed or permitted by the insurance departments of the states in which we are domiciled ("statutory accounting principles").

Use of Estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. The financial statement categories that are most dependent on management estimates and assumptions include: investments; deferred policy acquisition costs; reinsurance receivables and recoverables; future policy benefits and losses, claims and loss settlement expenses; and pension and post-retirement benefit obligations.

Property and Casualty and Life Insurance Business

Property and Casualty Insurance Business

Premiums written are deferred and recorded as earned premium on a daily pro rata basis over the terms of the respective policies. Unearned premium reserves are established for the portion of premiums written applicable to the unexpired term of insurance policies in force.

Life Insurance Business

Our whole life and term insurance (i.e., traditional business) premiums are reported as earned when due and benefits and expenses are associated with premium income in order to result in the recognition of profits over the lives of the related contracts.

Loss and Loss Settlement Expense Reserves

To establish loss and loss settlement expense reserves, we make estimates and assumptions about the future development of claims. Actual results could differ materially from those estimates, which are subjective, complex and inherently uncertain. When we establish and adjust reserves, we do so given our knowledge at the time of the circumstances and facts of known claims. To the extent that we have overestimated or underestimated our loss and loss settlement expense reserves, we adjust the reserves in the period in which such adjustment is determined.

Premiums Receivable

Premiums receivable are presented net of an estimated allowance for doubtful accounts, which is based on a periodic evaluation of the aging and collectability of amounts due from agents and policyholders.

Premiums receivable are presented net of an estimated allowance for doubtful accounts.

Universal Life and Annuity Policies

On universal life and deferred annuity policies (i.e., non-traditional business), income and expenses are reported when charged and credited to policyholder account balances in order to result in recognition of profits over the lives of the related contracts. We accomplish this by means of a provision for future policy benefits and the deferral and subsequent amortization of policy acquisition costs.

Future Policy Benefits Liability

Liabilities for future policy benefits for traditional products are computed by the net level premium method, using interest assumptions ranging from 3.7 percent to 6.0 percent and withdrawal, mortality and morbidity assumptions appropriate at the time the policies were issued. Liabilities for non-traditional business are stated at policyholder account values before surrender charges. Liabilities for traditional immediate annuities are based primarily upon future anticipated cash flows using assumptions for mortality and interest rates. Liabilities for deferred annuities are carried at the account value.

Reinsurance

Premiums earned and losses and loss settlement expenses incurred are reported net of reinsurance ceded. Ceded insurance business is accounted for on a basis consistent with the original policies issued and the terms of the reinsurance contracts.

Investments

Investments in fixed maturities include bonds and redeemable preferred stocks. Our investments in held-to-maturity fixed maturities are recorded at amortized cost. Our investments in available-for-sale fixed maturities and trading securities are recorded at fair value.

Investments in equity securities, which include common and non-redeemable preferred stocks, are classified as available-for-sale or trading and are recorded at fair value.

Changes in unrealized appreciation and depreciation, with respect to available-for-sale fixed maturities and equity securities, are reported as a component of accumulated other comprehensive income, net of applicable deferred income taxes, in stockholders' equity. Changes in unrealized appreciation and depreciation, with respect to trading securities, are reported as a component of income.

Other long-term investments consist primarily of our interests in limited liability partnerships that are recorded on the equity method of accounting. Mortgage loans are recorded at their unpaid principal balance. Policy loans are recorded at the outstanding loan amount due from policyholders.

Cash and Cash Equivalents

For purposes of reporting cash flows, cash and cash equivalents include cash, money market accounts, and non-negotiable certificates of deposit with original maturities of three months or less.

Deferred Policy Acquisition Costs

Property and casualty insurance policy acquisition costs deferred are amortized as premium revenue is recognized. The method followed in computing DAC limits the amount of such deferred costs to their estimated realizable value. This takes into account the premium to be earned, losses and loss settlement expenses expected to be incurred and certain other costs expected to be incurred as the premium is earned. After reviewing our DAC model at March 31, 2015, we enhanced our property and casualty insurance segment DAC model by updating our aggregation of certain lines of business in a manner consistent with how the policies are currently being marketed and managed. With the completion of the Mercer Insurance Group, Inc. integration, we determined it was the appropriate time to review our DAC models. The impact of these updates to the model resulted in an increase to DAC amortization of $2,144 and an increase to the DAC asset of $3,830 for the period ended December 31, 2015, as compared to what we would have recognized had we not updated our model.

For traditional life insurance policies, DAC is amortized to income over the premium-paying period in proportion to the ratio of the expected annual premium revenue to the expected total premium revenue. Expected premium revenue and gross profits are based on the same mortality and withdrawal assumptions used in determining future policy benefits. These assumptions are not revised after policy issuance unless the recorded DAC asset is deemed to be unrecoverable from future expected profits.

For non-traditional life insurance policies, DAC is amortized over the anticipated terms in proportion to the ratio of the expected annual gross profits to the total expected gross profits. Changes in the amount or timing of expected gross profits result in adjustments to the cumulative amortization of these costs. The effect on amortization of DAC for revisions to estimated gross profits is reported in earnings in the period the estimated gross profits are revised.

The effect on DAC that results from the assumed realization of unrealized gains (losses) on investments allocated to non-traditional life insurance business is recognized with an offset to net unrealized investment appreciation as of the balance sheet date.

Deferred Policy Acquisition Costs ("DAC")

Certain costs associated with underwriting new business (primarily commissions, premium taxes and variable underwriting and policy issue expenses associated with successful acquisition efforts) are deferred.

Property, Equipment and Depreciation

Property and equipment is presented at cost less accumulated depreciation.

Expenditures for maintenance and repairs on property and equipment are generally expensed as incurred. We periodically review these assets for impairment whenever events or changes in business circumstances indicate that the carrying value of the underlying asset may not be recoverable. A loss would be recognized if the estimated fair value of the asset were less than its carrying value.

Depreciation is computed primarily by the straight-line method over the following estimated useful lives:



	Useful Life
Computer equipment and software	Three years
Furniture and fixtures	Seven years
Leasehold improvements	Shorter of the lease term or useful life of the asset
Real estate	Seven to thirty-nine years
Airplane	Five years

Goodwill and Other Intangible Assets

Goodwill and other intangible assets arise as a result of business combinations and consist of the excess of the fair value of consideration paid over the tangible assets acquired and liabilities assumed. All of our goodwill and the majority of our intangible assets relate to the Mercer acquisition in 2011. We evaluate goodwill and other intangible assets for impairment at least on an annual basis or whenever events or changes in circumstances indicate that it is more likely than not that the carrying amount of goodwill and other intangible assets may exceed its implied fair value. Goodwill is evaluated at the reporting unit level. Any impairment is charged to operations in the period that the impairment is identified. In 2016 and 2015, we performed a quantitative impairment assessment of our goodwill and in 2014, we performed a qualitative impairment assessment of our goodwill. As a result of these assessments, we did not recognize an impairment charge on our goodwill in 2016, 2015 or 2014.

Our other intangible assets, which consist primarily of agency relationships, trade names, state insurance licenses, and software, are being amortized by the straight-line method over periods ranging from 2 years to 15 years, with the exception of state insurance licenses, which are indefinite-lived and not amortized.

Income Taxes

Deferred tax assets and liabilities are established based on differences between the financial statement bases of assets and liabilities and the tax bases of those same assets and liabilities, using the currently enacted statutory tax rates. Deferred income tax expense is measured by the year-to-year change in the net deferred tax asset or liability, except for certain changes in deferred tax amounts that affect stockholders' equity and do not impact federal income tax expense.

The Company performs a quarterly review of its tax positions and makes a determination whether it is more likely than not that the tax position will be sustained upon examination. If based on this review, it appears not more likely than not that the position will be sustained, the Company will calculate any unrecognized tax benefits and calculate any interest and penalties. At December 31, 2016, 2015, and 2014 the Company did not recognize any liability for unrecognized tax benefits. In addition, we have not accrued for interest and penalties related to unrecognized tax benefits. However, if interest and penalties would need to be accrued related to unrecognized tax benefits, such amounts would be recognized as a component of federal income tax expense.

We file a consolidated federal income tax return. We also file income tax returns in various state jurisdictions. We are no longer subject to federal or state income tax examination for years before 2009.

Stock-Based Compensation

We currently have two equity compensation plans. One plan allows us to grant restricted and unrestricted stock, stock appreciation rights, incentive stock options, and non-qualified stock options to employees. The other plan allows us to grant restricted and non-qualified stock options to non-employee directors.

We utilize the Black-Scholes option pricing method to establish the fair value of non-qualified stock options granted under our equity compensation plans. Our determination of the fair value of stock options on the date of grant using this option-pricing model is affected by our stock price, as well as assumptions regarding a number of complex and subjective variables, which include the expected volatility in our stock price, the expected term of the award, the expected dividends to be paid over the term of the award and the expected risk-free interest rate. Any changes in these assumptions may materially affect the estimated fair value of the award. For our restricted and unrestricted stock awards, we utilize the fair value of our common stock on the date of grant to establish the fair value of the award.

Comprehensive Income

Comprehensive income includes all changes in stockholders' equity during a period except those resulting from investments by and dividends to stockholders.

Subsequent Events

In the preparation of the accompanying financial statements, the Company has evaluated all material subsequent events or transactions that occurred after the balance sheet date through the date on which the financial statements were issued for potential recognition or disclosure in the Company's financial statements.

Recently Issued Accounting Standards and Pending Adoption of Accounting Standards

Recently Issued Accounting Standards

Accounting Standards Adopted in 2016

Short-Duration Contracts

In May 2015, the Financial Accounting Standards Board ("FASB") issued guidance on disclosure requirements for short-duration contracts. The new guidance requires additional disclosures about the liability for unpaid loss and loss adjustment expenses and requires disclosure of any information about significant changes in methodologies and assumptions used to calculate the liability. The new guidance is effective for annual periods beginning after December 15, 2015 and interim periods beginning the following year. The Company has included the new annual disclosures beginning with the December 31, 2016 annual financial statements. The adoption of the new guidance changed disclosures in Note 5 "Reserves for Losses and Loss Settlement Expenses," of this section regarding short- duration contracts, but had no impact on the Company's financial position or results of operations.

Other Internal Use Software

In April 2015, the FASB issued guidance which clarifies customers' accounting for fees paid for cloud computing arrangements. The new standard provides guidance to customers about whether a cloud computing arrangement includes a software license or whether the arrangement is considered a service contract. The new guidance is effective for annual and interim periods beginning after December 15, 2015. The Company adopted the new guidance as of January 1, 2016. The adoption of the new guidance had no impact on the Company's financial position or results of operations as we have no material cloud computing arrangements.

Debt Issuance Costs

In April 2015, the FASB issued new guidance on the presentation of debt issuance costs. The new guidance requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of the debt liability. The new guidance is effective for annual and interim periods beginning after December 15, 2015. The Company adopted the new guidance as of January 1, 2016. The adoption of the new guidance had no impact on the Company's financial position or results of operations in 2016 as we did not issue any debt.

Consolidation

In February 2015, the FASB issued amendments to the consolidation guidance that a reporting entity follows to determine whether it should consolidate certain legal entities. Specifically, the new guidance modifies the evaluation of whether limited partnerships and similar legal entities are variable interest entities ("VIE"), eliminates the presumption that a general partner should consolidate a limited partnership and affects the consolidation analysis of reporting entities that have VIE's, particularly those with fee arrangements and related party relationships. The new guidance is effective for annual and interim periods beginning after December 15, 2015. The Company adopted the guidance as of January 1, 2016. The adoption of the new guidance had no impact on the Company's financial position or results of operations.

Going Concern

In August 2014, the FASB issued new guidance on the disclosure of uncertainties about an entity's ability to continue as a going concern. The new guidance requires management to evaluate whether there is substantial doubt about the entity's ability to continue as a going concern and, if so, to disclose that fact and what the entity's plans are to alleviate that doubt. The guidance is effective for annual periods ending after December 15, 2016 and interim periods within annual periods beginning after December 15, 2016. The Company adopted the guidance as of January 1, 2016. The adoption of the new guidance had no impact on the Company's financial position or results of operations.

Share-Based Payments

In June 2014, the FASB issued new guidance on the accounting for share-based payments when the terms of an award provide that a performance target could be achieved after the requisite service period. The new guidance requires a performance target that affects vesting and that could be achieved after the service period, be treated as a performance condition. The guidance is effective for interim and annual periods beginning after December 15, 2015. The amendments can be applied prospectively or retrospectively and early adoption is permitted. The Company adopted the guidance as of January 1, 2016. The adoption of the new guidance had no impact on the Company's financial position or results of operations.

Pending Adoption of Accounting Standards

Share-Based Payments

In March 2016, the FASB issued new guidance on the accounting for share-based payments. The new guidance was issued to simplify the accounting of share-based payments, specifically in the areas of income taxes, classification on the balance sheets as liabilities or equity and classification in the cash flow statement. The new guidance is effective for annual periods beginning after December 15, 2016 and interim periods within those years. The Company adopted the new guidance as of January 1, 2017. The new guidance will result in classification changes between the financing and operating section of the Statement of Cash Flow. The new guidance will also result in additional tax expense or net income, but will vary depending on the number of stock options granted and exercised.

Income Taxes

In December 2015, the FASB issued guidance on the balance sheet classification of deferred taxes. The new guidance eliminates the requirement to split deferred tax liabilities and assets between current and non-current in a classified balance sheet. The new guidance allows deferred tax liabilities and assets to be included in non-current accounts. The Company adopted the new guidance as of January 1, 2017. The adoption will have no impact on the Company's financial position and results of operations since we do not currently report deferred taxes in classified balance sheets.

Revenue Recognition

In May 2014, the FASB issued comprehensive new guidance on revenue recognition which supersedes nearly all existing revenue recognition guidance under GAAP. The new guidance requires a company to recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. The standard creates a five-step model that requires companies to exercise judgment when considering the terms of the contract(s) and all relevant facts and circumstances. Insurance contracts are not within the scope of this new guidance. The new guidance is effective for annual and interim periods beginning after December 15, 2017. The Company will adopt the guidance as of January 1, 2018. The adoption of the new guidance will have no impact on the Company's reporting and disclosure of net premiums earned, net investment income or net realized gains and losses, as these items are not within the scope of this new guidance. The Company is currently evaluating the impact on the Company's financial position and results of operations with other revenue streams under this new guidance. These other revenue streams, currently reported in other income in the Consolidated Statements of Income and Comprehensive Income, are not a material amount of the Company's total revenue.

Financial Instruments

In January 2016, the FASB issued guidance updating certain aspects of recognition, measurement, presentation, and disclosure of financial instruments. The amendments in this update supersede the guidance to classify equity securities with readily determinable fair values into different categories (for example, trading or available-for-sale) and require equity securities to be measured at fair value with changes in the fair value recognized through net income. The new guidance also simplifies the impairment process for equity investments without readily determinable fair values. The new guidance is effective for annual periods beginning after December 15, 2017 and interim periods within those years. The Company will adopt the new guidance as of January 1, 2018 and is currently evaluating the impact on the Company's financial position, results of operations and key processes. If the new guidance were adopted as of December 31, 2016, there would be a reclassification from accumulated other comprehensive income to retained earnings equal to the amount of net unrealized gains and losses on available-for-sale equity securities at December 31, 2015 disclosed in Note 2 "Summary of Investments," of this section. The impact to net realized gains (losses) would equal the change in net unrealized gains and losses on available-for-sale equity securities between December 31, 2016 and December 31, 2015, in the same tables.

Statement of Cash Flows - Classification of Certain Cash Receipts and Payments

In August 2016, the FASB issued an update that clarifies the classification of certain cash receipts and payments in the Statement of Cash Flows. The update addresses eight existing cash flow issues by clarifying the correct classification to establish uniformity in practice. The updated guidance is effective for annual periods beginning after December 15, 2017 and interim periods within those years. The Company will adopt the new guidance as of January 1, 2018 and is currently reviewing the updates to the eight existing cash flow issues. Currently, management believes that one existing cash flow issue will be impacted by these updates. Management believes the update will have no impact on the Company's financial position and results of operations but may effect the current classification of the cash flow in the Statement of Cash Flows.

Leases

In February 2016, the FASB issued guidance on the accounting for leases. The new guidance requires lessees to place most leases on their balance sheets with expenses recognized on the income statement in a similar manner as previous methods. The new guidance is effective for annual periods beginning after December 15, 2018 and interim periods within those years. The Company will adopt the new guidance as of January 1, 2019. The Company has created an inventory of its leases and has calculated the current minimum future lease payment which is disclosed in Note 13 "Lease Commitments."

Financial Instruments - Credit Losses

In June 2016, the FASB issued new guidance on the measurement of credit losses for most financial instruments. The new guidance replaces the current incurred loss model for recognizing credit losses with an expected loss model for instruments measured at amortized cost and requires allowances to be recorded for available-for-sale debt securities rather than reduce the carrying amount. These allowances will be remeasured each reporting period. The new guidance is effective for annual periods beginning after December 15, 2020 and interim periods within those years. The Company will adopt the new guidance as of January 1, 2021 and is currently evaluating the impact on the Company's financial position, results of operations and key processes.

Income Taxes - Intra-entity Transfers

In October 2016, the FASB issued new guidance on the income tax treatment of intra-entity transfers. The new guidance replaces the current guidance which prohibits the recognition of current and deferred income taxes of intra-entity transfers until the asset is sold externally. Under the new guidance, the exemption is eliminated and income taxes will be recognized on transfers of intra-entity assets. The new guidance is effective for annual periods beginning after December 15, 2018 and interim periods beginning after December 15, 2019. The Company will adopt the new guidance as of January 1, 2019 and is currently evaluating the impact on the Company's financial position and results of operations.

Goodwill

In January 2017, the FASB issued new guidance which simplifies the test for goodwill impairment. The new guidance eliminates the implied fair value calculation when measuring a goodwill impairment charge. Under the new guidance, impairment charges will be based on the excess of the carrying value over fair value of goodwill. The new guidance is effective for annual and interim periods beginning after December 15, 2019. The Company will adopt the new guidance as of January 1, 2020 and is currently evaluating the impact on the Company's financial position and results of operations.

Fair Value Measurement

Current accounting guidance on fair value measurements includes the application of a fair value hierarchy that requires us to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. Our financial instruments that are recorded at fair value are categorized into a three-level hierarchy, which is based upon the priority of the inputs to the valuation technique. The fair value hierarchy gives the highest priority to quoted prices in active markets for identical assets (i.e., Level 1) and the lowest priority to unobservable inputs (i.e., Level 3). If the inputs used to measure fair value fall within different levels of the hierarchy, the category level is based on the lowest priority level input that is significant to the fair value measurement of the financial instrument.

Financial instruments recorded at fair value are categorized in the fair value hierarchy as follows:


•	Level 1: Valuations are based on unadjusted quoted prices in active markets for identical financial instruments that we have the ability to access.


•	Level 2: Valuations are based on quoted prices for similar financial instruments, other than quoted prices included in Level 1, in markets that are not active or on inputs that are observable either directly or indirectly for the full term of the financial instrument.


•	Level 3: Valuations are based on pricing or valuation techniques that require inputs that are both unobservable and significant to the overall fair value measurement of the financial instrument. Such inputs may reflect management's own assumptions about the assumptions a market participant would use in pricing the financial instrument.

We review our fair value hierarchy categorizations on a quarterly basis at which time the classification of certain financial instruments may change if the input observations have changed. Transfers between levels, if any, are recorded as of the beginning of the reporting period.

To determine the fair value of the majority of our investments, we utilize prices obtained from independent, nationally recognized pricing services. We obtain one price for each security. When the pricing services cannot provide a determination of fair value for a specific security, we obtain non-binding price quotes from broker-dealers with whom we have had several years experience and who have demonstrated knowledge of the subject security. We request and utilize one broker quote per security.

In order to determine the proper classification in the fair value hierarchy for each security where the price is obtained from an independent pricing service, we obtain and evaluate the vendors' pricing procedures and inputs used to price the security, which include unadjusted quoted market prices for identical securities, such as a New York Stock Exchange closing price, and quoted prices for identical securities in markets that are not active. For fixed maturity securities, an evaluation of interest rates and yield curves observable at commonly quoted intervals, volatility, prepayment speeds, credit risks and default rates may also be performed. We have determined that these processes and inputs result in fair values and classifications consistent with the applicable accounting guidance on fair value measurements.

When possible, we use quoted market prices to determine the fair value of fixed maturities, equity securities, trading securities and short-term investments. When quoted market prices do not exist, we base estimates of fair value on market information obtained from independent pricing services and brokers or on valuation techniques that are both unobservable and significant to the overall fair value measurement of the financial instrument. Such inputs may reflect management's own assumptions about the assumptions a market participant would use in pricing the financial instrument. Our valuation techniques are discussed in more detail throughout this section.

The fair value of our mortgage loans is determined by modeling performed by us based on the stated principal and coupon payments provided for in the loan agreements. These cash flows are then discounted using an appropriate risk-adjusted discount rate to determine the security's fair value, which is a Level 3 fair value measurement.

The fair value of our policy loans is equivalent to carrying value, which is a reasonable estimate of fair value and is classified as Level 2. We do not make policy loans for amounts in excess of the cash surrender value of the related policy. In all instances, the policy loans are fully collateralized by the related liability for future policy benefits for traditional insurance policies or by the policyholders' account balance for non-traditional policies.

Our other long-term investments consist primarily of our interests in limited liability partnerships that are recorded on the equity method of accounting. The fair value of the partnerships is obtained from the fund managers, which is based on the fair value of the underlying investments held in the partnerships. In management's opinion, these values represent a reasonable estimate of fair value. We have not adjusted the net asset value provided by the fund managers.

For cash and cash equivalents and accrued investment income, carrying value is a reasonable estimate of fair value due to the short-term nature of these financial instruments.

Policy reserves are developed and recorded for deferred annuities, which is an interest-sensitive product, and income annuities. The fair value of the reserve liability for these annuity products is based upon an estimate of the discounted pretax cash flows that are forecast for the underlying business, which is a Level 3 fair value measurement. We base the discount rate on the current U.S. Treasury spot yield curve, which is then risk-adjusted for nonperformance risk and, for interest-sensitive business and market risk factors. The risk-adjusted discount rate is developed using interest rates that are available in the market and representative of the risks applicable to the underlying business.

The Company formed a rabbi trust in 2014 to fund obligations under the United Fire & Casualty Company Non-qualified Deferred Compensation Plan and United Fire Group Supplemental Executive Retirement and Deferral Plan (collectively the "Executive Retirement Plans"). Within the rabbi trust, corporate-owned life insurance ("COLI") policies are utilized as an investment vehicle and source of funding for the Company's Executive Retirement Plans. The COLI policies invest in mutual funds, which are priced daily by independent sources. As of December 31, 2016, the cash surrender value of the COLI policies was $2,592, which is equal to the fair value measured using Level 2 inputs, based on the underlying assets of the COLI policies, and is included in other assets in the Consolidated Balance Sheets.

Earnings Per Share

Basic earnings per share is computed by dividing net income by the weighted-average number of common shares outstanding during the reporting period. Diluted earnings per share gives effect to all dilutive common shares outstanding during the reporting period. The dilutive shares we consider in our diluted earnings per share calculation relate to our outstanding stock options and restricted stock awards.

We determine the dilutive effect of our outstanding stock options using the "treasury stock" method. Under this method, we assume the exercise of all of the outstanding stock options whose exercise price is less than the weighted-average market value of our common stock during the reporting period. This method also assumes that the proceeds from the hypothetical stock option exercises are used to repurchase shares of our common stock at the weighted-average market value of the stock during the reporting period. The net of the assumed stock options exercised and assumed common shares repurchased represents the number of dilutive common shares, which we add to the denominator of the earnings per share calculation.