Significant Accounting Policies

Business: Torchmark Corporation (Torchmark or alternatively, the Company) through its wholly-owned subsidiaries provides a variety of life and supplemental health insurance products and annuities to a broad base of customers. Torchmark is organized into four reportable segments: life insurance, health insurance, annuity, and investment.

Basis of Presentation: The accompanying consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (GAAP), under guidance issued by the Financial Accounting Standards Board (FASB). 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 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.

Principles of Consolidation: The consolidated financial statements include the results of Torchmark and its wholly-owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. When Torchmark acquires a subsidiary or a block of business, the assets acquired and the liabilities assumed are measured at fair value at the acquisition date. Any excess of acquisition cost over the fair value of net assets is recorded as goodwill. Expenses incurred to effect the acquisition are charged to earnings as of the acquisition date. Upon acquisition, the accounts and results of operations are consolidated as of and subsequent to the acquisition date.

Torchmark accounts for its variable interest entities (VIEs) under accounting guidance which clarifies the definition of a variable interest and the instructions for consolidating VIEs. Only primary beneficiaries are required or allowed to consolidate VIEs. Therefore, a company may have voting control of a VIE, but if it is not the primary beneficiary, it is not permitted to consolidate the VIE. As further described under the caption Low-Income Housing Tax Credit Interests below in this note, Torchmark holds passive interests in limited partnerships which provide investment returns through the provision of tax benefits (principally from the transfer of federal or state tax credits related to federal low-income housing). These interests are considered to be VIEs. They are not consolidated because the Company has no power to control the activities that most significantly affect the economic performance of these entities and therefore the Company is not the primary beneficiary of any of these interests. Torchmark’s involvement is limited to its limited partnership interest in the entities. Torchmark has not provided any other financial support to the entities beyond its commitments to fund its limited partnership interests, and there are no arrangements or agreements with any of the interests to provide other financial support. The maximum loss exposure relative to these interests is limited to their carrying value.

Discontinued Operations: When a component of Torchmark’s business is sold or expected to be sold during the ensuing year, Torchmark considers whether the criteria of ASC 205-20, Discontinued Operations, have been met, which includes evaluating if the disposal of a component represents a strategic shift that has, or will have, a major effect on the Company. If the disposal meets the criteria for discontinued operations, the assets and liabilities are segregated and recorded in the Consolidated Balance Sheets as "Assets and Liabilities related to discontinued operations" for all periods presented. If the carrying amount of the business exceeds its estimated fair value, a loss is recognized. The results of operations for the discontinued component are reported in "Income from discontinued operations, net of tax" in the Consolidated Statements of Operations for current and prior periods. Discontinued operations are reported commencing in the period in which the business is either disposed of or meets the accounting criteria for discontinued operations, including any gain or loss recognized on the sale or adjustment of the carrying amount to the estimated fair value less cost to sell.

As discussed in further detail in Note 6—Discontinued Operations, Torchmark sold one of its operating segments, Medicare Part D during 2016. The financial results of this business are excluded from Torchmark's continuing operations including the Notes to the Consolidated Financial Statements, other than Note 2—Statutory Accounting and Note 6—Discontinued Operations.

Investments: Torchmark classifies all of its fixed maturity investments, which include bonds and redeemable preferred stocks, as available for sale. Investments classified as available for sale are carried at fair value with unrealized gains and losses, net of deferred taxes, reflected directly in accumulated other comprehensive income. Policy loans are carried at unpaid principal balances. Other long-term investments include equity securities, real estate, mortgage participations, and limited partnerships. Investments in equity securities, which include common and nonredeemable preferred stocks, are reported at fair value with unrealized gains and losses, net of deferred taxes, reflected directly in accumulated other comprehensive income. Investments in real estate are reported at cost less allowances for depreciation. Depreciation is calculated on the straight-line method. Mortgage participations, a type of investment where the mortgage loan is shared among investors, are accounted for as financing receivables. Investments in limited partnerships are primarily accounted for using the cost method of accounting as Torchmark's partnership interest is minor as Torchmark lacks the ability to exercise significant influence over the partnership's operating and financial policies. The Company considers its cost method investments for impairment when the carrying value of such investments exceeds the net asset value (“NAV”). As further discussed below in Accounting Pronouncements Not Yet Adopted, the Company will adopt ASU 2016-01 on January 1, 2018 which removes the cost method for certain investments and replaces it with fair value through net income method. Under the new guidance, limited partnerships will be reported at fair value and all fluctuations in fair value will be reported through realized gains and losses. Short-term investments include investments in interest-bearing assets with original maturities of twelve months or less. Gains and losses realized on the disposition of investments are determined on a specific identification basis.

Fair Value Measurements, Investments in Securities: Torchmark measures the fair value of its fixed maturities based on a hierarchy consisting of three levels which indicate the quality of the fair value measurements as described below:


•	Level 1—fair values are based on quoted prices in active markets for identical assets or liabilities that the Company has the ability to access as of the measurement date.

•

Level 2 —fair values are based on inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. Level 2 inputs include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability, or inputs that can otherwise be corroborated by observable market data.

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Level 3— fair values are based on inputs that are considered unobservable where there is little, if any, market activity for the asset or liability as of the measurement date. In this circumstance, the Company has to rely on values derived by independent brokers or internally-developed assumptions. Unobservable inputs are developed based on the best information available to the Company which may include the Company’s own data or bid and ask prices in the dealer market.

The great majority of Torchmark's fixed maturities are not actively traded and direct quotes are not generally available. Management therefore determines the fair values of these securities after consideration of data provided by third-party pricing services, independent broker/dealers, and other resources. At December 31, 2017, Torchmark's investments in fixed maturities were primarily composed of the following significant security types: Corporate securities, state and municipal securities, redeemable preferred stocks, and U.S. government securities. The remaining security types represented less than 1% of the total in the aggregate.

Over 95% of the fair value reported at December 31, 2017 was determined using data provided by third-party pricing services. Prices provided by these services are not binding offers, but are estimated exit values. Third-party pricing services use proprietary pricing models to determine security values by discounting cash flows using a market-adjusted spread to a benchmark yield.

For all asset classes within Torchmark’s significant security types, third-party pricing services use a common valuation technique to model the price of the investments using observable market data. The foundation for these models consists of developing yield spreads based on multiple observable market inputs, including but not limited to: benchmark yield curves, actual trading activity, new issue yields, broker-dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers, sector-specific data, economic data, and other inputs that are corroborated in the market. Pricing vendors monitor and review their pricing data continuously with current market and economic data feeds, augmented by ongoing communication within the dealer community.

Using the observable market inputs described above, spreads to an appropriate benchmark yield are further developed by the vendors for each security based on security-specific and/or sector-specific risk factors, such as a security’s terms and conditions (coupon, maturity, and call features), credit rating, sector, liquidity, collateral or other cash flow options, and other factors that could impact the risk of the security. Embedded repayment options, such as call and redemption features, are also taken into account in the pricing models. When the spread is determined, it is added to the security’s benchmark yield. The security's expected cash flows are discounted using this spread-adjusted yield, and the resulting present value of the discounted cash flows is the evaluated price.

When third-party vendor prices are not available, the Company attempts to obtain valuations from other sources, including but not limited to broker/dealers, broker quotes, and prices on comparable securities.

When valuations have been obtained for all securities in the portfolio, management reviews and analyzes the prices to ensure their reasonableness, taking into account available observable information. When two or more valuations are available for a security and the variance between the prices is 10% or less, the close correlation suggests similar observable inputs were used in deriving the price, and the mean of the prices is used. Securities valued in this manner are classified as Level 2. When the variance between two or more valuations for a security exceeds 10%, additional analysis is performed to determine the most appropriate value for that security, using resources such as broker quotes, prices on comparable securities, recent trades, and any other observable market data. Further review is performed on the available valuations to determine if they can be corroborated within reasonable tolerance to any other observable evidence. If one of the valuations or the mean of the available valuations for a security can be corroborated with other observable evidence, then the corroborated value is used and reported as Level 2. The Company uses information and analytical techniques deemed appropriate for determining the point within the range of reasonable fair value estimates that is most representative of fair value under current market conditions. Valuations that cannot be corroborated within a reasonable tolerance are classified as Level 3.

Torchmark invests in a portfolio of private placement bonds which are not actively traded. This portfolio is managed by third parties. The portfolio managers provide valuations for the bonds based on a pricing matrix utilizing observable inputs, such as the benchmark treasury rate and published sector indices, and unobservable inputs such as an internally-developed credit rating. If they cannot be corroborated, the fair values are classified as Level 3.

The fair values for each class of security and by valuation hierarchy level are indicated in Note 4—Investments under the caption Fair value measurements and Note 9—Postretirement Benefits under the caption Pension Plans.

Fair Value Measurements, Other Financial Instruments: Fair values for cash, short-term investments, short-term debt, mortgage participations, receivables and payables approximate carrying value. Policy loans are an integral part of Torchmark’s subsidiaries’ life insurance policies in force and their fair values cannot be valued separately and apart from the insurance contracts. The fair values of Torchmark’s long-term debt issues are based on the same methodology as investments in fixed maturities. At December 31, 2017, observable inputs were available for these debt securities and as such were classified as Level 2 in the valuation hierarchy. The fair value for each debt instrument as of December 31, 2017 is disclosed in Note 11—Debt. As described in Note 9—Postretirement Benefits, Torchmark maintains a nonqualified supplemental retirement plan. Therefore the assets which support the liability for this plan are considered general assets of the Company. These assets consist of the cash value of corporate-owned life insurance policies (COLI) and exchange traded funds (ETFs). The fair value of the insurance cash values approximates carrying value. Fair values for the ETFs are derived from direct quotes and are considered Level 1 in the valuation hierarchy.

Impairment of Investments: Torchmark’s portfolio of fixed maturities fluctuates in value due to changes in interest rates in the financial markets as well as other factors. Fluctuations caused by market interest rate changes have little bearing on whether or not the investment will be ultimately recoverable. Therefore, Torchmark considers these declines in value resulting from changes in market interest rates to be temporary. In certain circumstances, however, Torchmark determines that the decline in the value of a security is other-than-temporary and writes the book value of the security down to its fair value, realizing an investment loss. The evaluation of Torchmark’s securities for other-than-temporary impairments is a process that is undertaken at least quarterly and is overseen by a team of investment and accounting professionals. Each security, which is impaired because the fair value is less than the cost or amortized cost, is identified and evaluated. The determination that an impairment is other-than-temporary is highly subjective and involves the careful consideration of many factors. Among the factors considered are:


•	The length of time and extent to which the security has been impaired


•	The reason(s) for the impairment


•	The financial condition of the issuer and the prospects for recovery in fair value of the security


•	The Company’s ability and intent to hold the security until anticipated recovery


•	Expected future cash flows

The relative weight given to each of these factors can change over time as facts and circumstances change. In many cases, management believes it is appropriate to give relatively more weight to prospective factors than to retrospective factors. Prospective factors that are given more weight include prospects for recovery, the Company’s ability and intent to hold the security until anticipated recovery, and expected future cash flows.

Among the facts and information considered in the process are:


•	Financial statements of the issuer


•	Changes in credit ratings of the issuer


•	The value of underlying collateral


•	News and information included in press releases issued by the issuer


•	News and information reported in the media concerning the issuer


•	News and information published by or otherwise provided by credit analysts


•	The nature and amount of recent and expected future sources and uses of cash


•	Default on a required payment


•	Issuer bankruptcy filings

While all available information is taken into account, it is difficult to predict the ultimate recoverable amount of a distressed or impaired security. If a security is determined to be other-than-temporarily impaired, the cost basis of the security is written down to fair value and is treated as a realized loss in the period the determination is made. The written-down security will be amortized and revenue recognized in accordance with estimated future cash flows.

Current accounting guidance is such that if an entity intends to sell or if it is more likely than not that it will be required to sell an impaired security prior to recovery of its cost basis, the security is to be considered other-than-temporarily impaired and the full amount of impairment must be charged to earnings. Otherwise, losses on fixed maturities which are other-than-temporarily impaired are separated into two categories, the portion of loss which is considered credit loss and the portion of loss which is due to other factors. The credit loss portion is charged to earnings while the loss due to other factors is charged to other comprehensive income. The credit loss portion of an impairment is determined as the difference between the security’s amortized cost and the present value of expected future cash flows discounted at the security’s original effective yield rate. The temporary portion is the difference between this present value of expected future cash flows and fair value (as discounted by a market yield). The expected cash flows are determined using judgment and the best information available to the Company. Inputs used to derive expected cash flows include expected default rates, current levels of subordination, and loan-to-collateral value ratios.

Cash: Cash consists of balances on hand and on deposit in banks and financial institutions.

Accrued investment income: Accrued investment income consists of interest income or dividends earned on the investment portfolio, but are yet to be received as of the balance sheet date.

Other Receivables: Other receivables consist mostly of agent debit balances, which primarily represent commissions advanced to insurance agents. These balances are repaid to the Company over time as the premiums associated with the advanced commissions are collected by the Company and the agents' commissions on such premiums are retained. The balances were $378 million and $353 million at December 31, 2017 and 2016, respectively. Management believes these balances are recoverable as they are less than the estimated present value of future commissions.

Deferred Acquisition Costs: Certain costs of acquiring new insurance business are deferred and recorded as an asset. These costs are essential for the acquisition of new insurance business and are directly related to the successful issuance of an insurance contract including sales commissions, policy issue costs, and underwriting costs. Additionally, deferred acquisition costs (DAC) include the value of business acquired (VOBA), which are the costs of acquiring blocks of insurance from other companies or through the acquisition of other companies. These costs represent the difference between the fair value of the contractual insurance assets acquired and liabilities assumed compared against the assets and liabilities for insurance contracts that the Company issues or holds measured in accordance with GAAP.

DAC and VOBA are amortized in a systematic manner which matches these costs with the associated revenues. Policies other than universal life-type policies are amortized with interest over the estimated premium-paying period of the policies in a manner which charges each year’s operations in proportion to the receipt of premium income. Universal life-type policies are amortized with interest in proportion to estimated gross profits. The assumptions used to amortize acquisition costs with regard to interest, mortality, morbidity, and persistency are consistent with those used to estimate the liability for future policy benefits. For interest-sensitive and deposit-balance type products, these assumptions are reviewed on a regular basis and are revised if actual experience differs significantly from original expectations. For all other products, amortization assumptions are generally not revised once established.

DAC are subject to periodic recoverability and loss recognition testing to determine if there is a premium deficiency. These tests evaluate whether the present value of future contract-related cash flows will support the capitalized DAC asset. These cash flows consist primarily of premium income, less benefits and expenses taking inflation into account. The present value of these cash flows, less the benefit reserve, is then compared with the unamortized deferred acquisition cost balance. In the event the estimated present value of net cash flows is less, the deficiency would be recognized by a charge to earnings and either a reduction of unamortized acquisition costs or an increase in the liability for future benefits, as described under the caption Future Policy Benefits.

Advertising Costs: Costs related to advertising are generally charged to expense as incurred. However, certain Globe Life Direct Response advertising costs are capitalized when there is a reliable and demonstrated relationship between total costs and future benefits that is a direct result of incurring these costs. Globe Life Direct Response advertising costs consist primarily of the production and distribution costs of direct mail advertising materials, and when capitalized are included as a component of DAC. They are amortized in the same manner as other DAC. Globe Life Direct Response advertising costs charged to earnings and included in other operating expense were $9.3 million, $9.3 million, and $9.7 million in 2017, 2016, and 2015, respectively. At December 31, 2017, unamortized capitalized advertising costs included within DAC were $1.28 billion at December 31, 2017 and $1.25 billion at December 31, 2016.

Goodwill: The excess cost of a business acquired over the fair value of net assets acquired is reported as goodwill. Goodwill is subject to impairment testing in accordance with GAAP on an annual basis, or whenever potential impairment triggers occur. The Company may perform a qualitative analysis under certain circumstances, or perform a two-step quantitative analysis. In the qualitative analysis, the Company determines if it is more likely than not that the fair value of a reporting unit is less than its carrying amount by assessing current events and circumstances. If there are factors present indicating potential impairment, the Company would proceed to the two-step quantitative analysis.

In the two-step quantitative analysis, the Company utilizes two approaches, income and market, to determine the fair value of each reporting unit. In the income approach, judgment and assumptions are used in developing the projected cash flows for the reporting units, and such estimates are subject to change. The Company also exercises judgment in the determination of the discount rate as management believes this to be appropriate for the risk associated with the cash flow expectations. In the market approach, the Company utilizes the share price and a control premium based on businesses with similar assets to determine a fair value. In both cases, the fair value of each reporting unit is then measured against that reporting unit’s corresponding carrying value. In the event the fair value is less than the carrying value, further testing is required under the accounting guidance to determine the amount of impairment, if any. If there is an impairment in the goodwill of any reporting unit, it is written down and charged to earnings in the period of the test.

Torchmark tested its goodwill annually as of June 30th in each of the years 2015 through 2017. Torchmark’s goodwill was not impaired in any of those periods.

Low-Income Housing Tax Credit Interests: Torchmark invests in limited partnerships that provide low-income housing tax credits and other related federal income tax benefits to Torchmark. The carrying value of Torchmark’s investment in these entities was $228 million and $280 million at December 31, 2017 and 2016, respectively and was included in "Other assets" on the Consolidated Balance Sheets. As of December 31, 2017, Torchmark was obligated under future commitments of $34 million, which are recorded in "Other liabilities". For guaranteed investments acquired prior to January 1, 2015, the Company utilizes the effective-yield method of amortization while the proportional method of amortization is utilized for all non-guaranteed as well as guaranteed investments acquired on or after January 1, 2015. All amortization expense is recorded in "Income tax benefit (expense)" on the Consolidated Statements of Operations.

Property and Equipment: Property and equipment, included in “Other assets,” is reported at cost less allowances for depreciation. Depreciation is recorded primarily on the straight line method over the estimated useful lives of these assets which range from three to five years for equipment and ten to forty years for buildings and improvements. Ordinary maintenance and repairs are charged to income as incurred. Impairments, if any, are recorded when certain events and circumstances become evident that the fair value of the asset is less than its carrying amount. Original cost of property and equipment was $217 million at December 31, 2017 and $196 million at December 31, 2016. Accumulated depreciation was $109 million at year end 2017 and $99 million at the end of 2016. Depreciation expense was $10.5 million in 2017, $9.8 million in 2016, and $8.0 million in 2015. Internally generated software costs are expensed as incurred in the preliminary project phase and post-implementation phase, and will be capitalized during the application development stage.

Future Policy Benefits: The liability for future policy benefits for annuity and universal life-type products is represented by policy account value. The liability for future policy benefits for all other life and health products, approximately 87% of total future policy benefits, is determined on the net level premium method. This method provides for the present value of expected future benefit payments less the present value of expected future net premiums, based on estimated investment yields, mortality, morbidity, persistency and other assumptions which were considered appropriate at the time the policies were issued. For limited-payment contracts, a deferred profit liability is also recorded which causes profits to emerge over the life of the contract in proportion to policies in force.

Assumptions used for traditional life and health insurance products are based primarily on Company experience. Assumptions for interest rates range from 2.5% to 7.0% for Torchmark’s insurance companies with an overall weighted average assumed rate of 5.80%. Mortality tables used for individual life insurance include various statutory tables and modifications of a variety of generally accepted actuarial tables. Morbidity assumptions for individual health are based on Company experience and industry data. Withdrawal and termination assumptions are based on Torchmark’s experience. Once established, assumptions for these products are generally not changed. An additional provision is made on most products to allow for possible adverse deviation from the assumptions. These estimates are reviewed annually and compared with actual experience. If it is determined that existing contract liabilities, together with the present value of future gross premiums, will not be sufficient to cover the present value of future benefits and to recover unamortized deferred acquisition costs, then a premium deficiency exists. Such a deficiency would be recognized immediately by a charge to earnings and either a reduction of unamortized deferred acquisition costs or an increase in the liability for future policy benefits. From that point forward, the liability for future policy benefits would be based on revised assumptions.

Policy Claims and Other Benefits Payable: Torchmark establishes a liability for known policy benefits payable and an estimate of claims that have been incurred but not yet reported to the Company. Torchmark makes an estimate of unreported claims after careful evaluation of all information available to the Company. This estimate is based on prior experience and is reviewed quarterly. However, there is no certainty the stated liability for claims and other benefits, including the estimate of unsubmitted claims, will be Torchmark’s ultimate obligation.

Income Taxes: Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement book values and tax bases of assets and liabilities. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date.

On December 22, 2017, the Tax Cuts and Jobs Act (Tax Legislation) was enacted into law which changed existing tax law, including a reduction of the corporate income tax rate from 35% to 21% effective January 1, 2018. The Company recorded $877 million of tax benefits in net income in 2017 as a result of re-measuring its deferred assets and liabilities using the lower corporate tax rate as of the date of enactment. Based on the analysis of the Tax Legislation, the Company was able to determine that this amount is a reasonable estimate of the impact of the Tax Legislation in accordance with SEC Staff Accounting Bulletin (SAB) No. 118. However, the Company will continue to analyze relevant information to complete the accounting for income taxes which may result in an adjustment to tax expense in 2018. The accounting is expected to be complete when the 2017 U.S. corporate income tax returns are filed later in 2018. More information concerning income taxes is provided in Note 8—Income Taxes.

Postretirement Benefits: Torchmark accounts for its postretirement defined benefit plans by recognizing the funded status of those plans on its Consolidated Balance Sheets in accordance with accounting guidance. Periodic gains and losses attributable to changes in plan assets and liabilities that are not recognized as components of net periodic benefit costs are recognized as components of other comprehensive income, net of tax. More information concerning the accounting and disclosures for postretirement benefits is found in Note 9—Postretirement Benefits.

Treasury Stock: Torchmark accounts for purchases of treasury stock on the cost method. Issuance of treasury stock is accounted for using the weighted-average cost method. More information is found in Note 12—Shareholders' Equity.

Recognition of Premium Revenue and Related Expenses: Premium income for traditional long-duration life and health insurance products is recognized evenly over the contract period and when due from the policyholder. Premiums for short-duration health contracts are recognized as revenue over the contract period in proportion to the insurance protection provided. Premiums for universal life-type and annuity contracts are added to the policy account value, and revenues for such products are recognized as charges to the policy account value for mortality, administration, and surrenders (retrospective deposit method). Life premium includes policy charges of $17 million, $18 million, and $19 million for the years ended December 31, 2017, 2016, and 2015, respectively. Other premium consists of annuity policy charges in each year. For most insurance products, the related benefits and expenses are matched with revenues by means of the provision of future policy benefits and the amortization of DAC in a manner which recognizes profits as they are earned over the revenue recognition period. For limited-payment life insurance products, the profits are recognized over the contract period.

Stock-Based Compensation: Torchmark accounts for stock-based compensation by recognizing an expense in the financial statements based on the “fair value method.” The fair value method requires that a fair value be assigned to a stock option or other stock grant on its grant date and that this value be amortized over the grantees’ service period.

The fair value method requires the use of an option valuation model to value employee stock options. Torchmark has elected to use the Black-Scholes valuation model for option expensing. A summary of assumptions for options granted in each of the three years 2015 through 2017 is as follows:



	2017		2016		2015
Volatility factor	14.8	%	19.2	%	23.6	%
Dividend yield	0.7	%	1.1	%	0.9	%
Expected term (in years)	5.71		5.78		5.66
Risk-free rate	2.0	%	1.3	%	1.6	%

The expected term is generally derived from Company experience. However, expected terms are determined based on the simplified method as permitted under the ASC 718 Stock Compensation topic when Company experience is insufficient. The Torchmark Corporation 2011 Incentive Plan replaced all previous plans and allows for option grants for employees with a ten-year contractual term which vest over five years in addition to seven-year grants which vest over three years as permitted by the previous plans. Director grants vest over six months. The Company has sufficient experience with seven-year grants that vest in three years, but insufficient historical experience with five-year vesting. Therefore, Torchmark has used the simplified method to determine the expected term for the ten-year grants with five-year vesting and will do so until adequate experience is developed. Volatility and risk-free interest rates are assumed over a period of time consistent with the expected term of the option. Volatility is measured on a historical basis. Monthly data points are utilized to derive volatility for periods greater than three years. Expected dividend yield is based on current dividend yield held constant over the expected term. Once the fair value of an option has been determined, it is amortized on a straight-line basis over the employee’s service period for that grant (from the grant date to the date the grant is fully vested). Expenses for restricted stock and restricted stock units are based on the grant date fair value allocated on a straight-line basis over the service period. Performance share expense is recognized based on management’s estimate of the probability of meeting the metrics identified in the performance share award agreement, assigned to each service period as these estimates develop.

Torchmark management views all stock-based compensation expense as a corporate or Parent Company expense and, therefore, presents it as such in its segment analysis (See Note 14—Business Segments). It is included in “Other operating expense” in the Consolidated Statements of Operations.

Earnings Per Share: Torchmark presents basic and diluted earnings per common share (EPS) on the face of the Consolidated Statements of Operations for income from continuing operations and income from discontinued operations. Basic EPS is computed by dividing income available to common shareholders by the weighted average common shares outstanding for the period. Diluted EPS is calculated by adding to shares outstanding the additional net effect of potentially dilutive securities or contracts, such as stock options, which could be exercised or converted into common shares. For more information on earnings per share, see Note 12—Shareholders’ Equity.

Accounting Pronouncements Adopted in the Current Year:

ASU 2018-02: In February 2018, the FASB issued ASU No. 2018-02, Income Statement—Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income (AOCI). This guidance was issued to allow the reclassification of taxes from AOCI to retained earnings as a result of the reduction in corporate income tax rates due to Tax Legislation. Current accounting requires the effect of changes in tax rates used to measure deferred tax assets and liabilities to be reported in net income as of the date of enactment even though deferred taxes were previously recognized in AOCI (stranded taxes). This guidance, however, allows a company to elect to reclassify the stranded taxes in AOCI to retained earnings and is effective for years beginning after December 15, 2018, with early adoption permitted. The Company elected to early adopt this guidance resulting in a reclassification of $252 million from AOCI to retained earnings for the period ended December 31, 2017. See Consolidated Statements of Shareholders' Equity and Note 3—Supplemental Information about Changes to Accumulated Other Comprehensive Income.

Accounting Pronouncements Not Yet Adopted:

ASU 2016-01: In January 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2016-01, Financial Instruments—Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities, which primarily revises the classification and measurement of certain equity investments such that they will be measured at fair value through net income. Additionally, it eliminates the cost method for partnerships and joint ventures and requires these types of investments to be accounted for under the fair value through net income method or equity method. Lastly, the guidance will require certain disclosures associated with fair value of financial instruments. This standard became effective for the Company on January 1, 2018. The adoption will result in a $6 million positive adjustment to the opening balance of retained earnings as we have minimal ownership interests in equity investments and partnerships.

ASU 2016-02: In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842), which requires all lessees to report a right-of-use asset and a lease liability for leases with a term life greater than 12 months. Operating and financing leases will be recognized on the balance sheet going forward. Additional qualitative and quantitative disclosures will be required. This standard will become effective for the Company beginning January 1, 2019 and will require recognizing and measuring leases at the beginning of the earliest period presented using a modified retrospective approach. Early adoption is permitted. The Company does not expect the adoption to have a significant impact on the financial statements. Refer to Note 15—Commitments and Contingencies for consideration of the noncancelable operating lease commitments. The Company is not a lessor.

ASU 2016-13: In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments to provide financial statement users with more decision-useful information about the expected credit losses on financial instruments as well as to change the loss impairment methodology for available-for-sale debt securities by use of an allowance rather than a direct write-down. This standard will become effective on January 1, 2020. The applicable section of the standard related to debt securities requires a prospective transition. The Company does not expect the adoption to have a significant impact on the financial statements as we have limited credit losses with respect to our available-for-sale portfolio.

ASU 2016-15: In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments to provide uniformity in the classification of cash receipts and payments recorded in the statement of cash flows including debt prepayment or debt extinguishment costs, settlement of zero-coupon bonds, and proceeds from the settlement of insurance claims. This standard became effective on January 1, 2018 and will not have a significant impact to the classification on our Statement of Cash Flows.

ASU 2016-16: In October 2016, the FASB issued ASU No. 2016-16, Income Taxes (Topic 740): Intra-Entity Transfer of Assets Other Than Inventory. This guidance was issued to improve the accounting for income tax consequences of intra-entity transfers of assets other than inventory by allowing the immediate recognition of the current and deferred income tax effects. Current guidance prohibits the recognition of current and deferred income taxes for an intra-entity transfer until the asset has been sold to an outside party. This new guidance should be applied on a modified retrospective approach and became effective on January 1, 2018. This adoption will not have a significant impact on the financial statements.

ASU 2017-04: In January 2017, the FASB issued ASU No. 2017-04, Intangibles—Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. This guidance was issued to simplify the subsequent measurement of goodwill through the elimination of Step 2 from the goodwill impairment test which required a hypothetical purchase price allocation. It will become effective on January 1, 2020 and should be applied on a prospective basis. This adoption will not have an impact to the financial statements.

ASU 2017-07: In March 2017, the FASB issued ASU No. 2017-07, Compensation—Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. This guidance was issued to simplify the reporting of pension costs by disaggregating the service-cost component from the other components of net benefit costs and reporting it separately on the income statement. The service-cost component is the only component of net benefit cost that will be eligible for capitalization. The guidance became effective on January 1, 2018 with a retrospective transition method for separation of net benefit costs and a prospective transition method for the capitalization of service costs. The Company expects the adoption to add an additional $3 to $5 million in expense to the 2018 Consolidated Statements of Operations due to the elimination of the ability to capitalize a portion of the benefit costs.

ASU 2017-08: In March 2017, the FASB issued ASU No. 2017-08, Receivables—Nonrefundable Fees and Other Costs (Topic 310-20): Premium Amortization on Purchased Callable Debt Securities. This guidance was issued to shorten the amortization period for certain callable debt securities held at a premium. The guidance requires the premium to be amortized to the earliest call date. It will become effective on January 1, 2019 with early adoption permitted, including during interim periods. The adoption is to be applied on a modified retrospective basis through an adjustment to retained earnings. This adoption will not have a significant impact on the financial statements.

ASU 2017-09: In May 2017, the FASB issued ASU No. 2017-09, Compensation—Stock Compensation (Topic 718): Scope of Modification Accounting. This guidance was issued to provide clarity and guidance regarding changes to the terms or conditions of a share-based payment award that requires an entity to apply modification accounting. It became effective on January 1, 2018 with early adoption permitted, including adoption in any interim periods. The adoption will have a minimal impact on the financial statements as modifications to stock compensation are infrequent.