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Summary of Significant Accounting Policies | 12 Months Ended
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Dec. 31, 2016
Accounting Policies [Abstract] |
Summary of Significant Accounting Policies | SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Nature of Business: Werner Enterprises, Inc. (the “Company”) is a truckload transportation and logistics company operating under the jurisdiction of the U.S. Department of Transportation, similar governmental transportation agencies in the foreign countries in which we operate and various U.S. state regulatory authorities. For the years ended December 31, 2016, 2015 and 2014, our ten largest customers comprised 43%, 45% and 41%, respectively, of our revenues. No single customer generated more than 10% of the Company’s total revenues in 2016, 2015, and 2014. Principles of Consolidation: The accompanying consolidated financial statements include the accounts of Werner Enterprises, Inc. and our majority-owned subsidiaries. All significant intercompany accounts and transactions relating to these majority-owned entities have been eliminated. Use of Management Estimates: The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the (i) reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and (ii) reported amounts of revenues and expenses during the reporting period. The most significant estimates that affect our financial statements include the useful lives and salvage values of property and equipment, accrued liabilities for insurance and claims, estimates for income taxes and the allowance for doubtful accounts. Actual results could differ from those estimates. Cash and Cash Equivalents: We consider all highly liquid investments, purchased with a maturity of three months or less, to be cash equivalents. Accounts at banks with an aggregate excess of the amount of checks issued over cash balances are included in current liabilities in the Consolidated Balance Sheets, and changes in such accounts are reported as a financing activity in the Consolidated Statements of Cash Flows. Trade Accounts Receivable: We record trade accounts receivable at the invoiced amounts, net of an allowance for doubtful accounts. The allowance for doubtful accounts is our estimate of the amount of probable credit losses and revenue adjustments in our existing accounts receivable. We review the financial condition of customers for granting credit and determine the allowance based on analysis of individual customers’ financial condition, historical write-off experience and national economic conditions. We evaluate the adequacy of our allowance for doubtful accounts quarterly. Past due balances over 90 days and exceeding a specified amount are reviewed individually for collectibility. Account balances are charged off against the allowance after all means of collection have been exhausted and the potential for recovery is considered remote. We do not have any off-balance-sheet credit exposure related to our customers. Inventories and Supplies: Inventories and supplies are stated at the lower of average cost or market and consist primarily of revenue equipment parts, tires, fuel and supplies. Tires placed on new revenue equipment are capitalized as a part of the equipment cost. Replacement tires are expensed when placed in service. Property, Equipment, and Depreciation: Additions and improvements to property and equipment are capitalized at cost, while maintenance and repair expenditures are charged to operations as incurred. Gains and losses on the sale or exchange of equipment are recorded in other operating expenses. Depreciation is calculated based on the cost of the asset, reduced by the asset’s estimated salvage value, using the straight-line method. Accelerated depreciation methods are used for income tax purposes. The lives and salvage values assigned to certain assets for financial reporting purposes are different than for income tax purposes. For financial reporting purposes, assets are generally depreciated using the following estimated useful lives and salvage values:
|  | Lives |  | Salvage Values
Building and improvements |  | 30 years |  | 0%
Tractors |  | 80 months |  | 0%
Trailers |  | 12 years |  | $1,000
Service and other equipment |  | 3-10 years |  | 0%
During fourth quarter 2016, due to the weak used truck market, we reduced the estimated life of certain trucks to more rapidly depreciate the trucks to their residual values. The effect of this change in accounting estimate was to increase 2016 depreciation expense and decrease operating income by $4.1 million and decrease net income by $2.6 million, or approximately $0.04 per diluted share. We expect depreciation expense for these trucks to continue at a similar higher level in first quarter 2017 and then gradually decline as these trucks are sold in the first few quarters of 2017. Long-Lived Assets: We review our long-lived assets for impairment whenever events or circumstances indicate the carrying amount of a long-lived asset may not be recoverable. An impairment loss would be recognized if the carrying amount of the long-lived asset is not recoverable and the carrying amount exceeds its fair value. For long-lived assets classified as held and used, the carrying amount is not recoverable when the carrying value of the long-lived asset exceeds the sum of the future net cash flows. We do not separately identify assets by operating segment because tractors and trailers are routinely transferred from one operating fleet to another. As a result, none of our long-lived assets have identifiable cash flows from use that are largely independent of the cash flows of other assets and liabilities. Thus, the asset group used to assess impairment would include all of our assets. Insurance and Claims Accruals: Insurance and claims accruals (both current and non-current) reflect the estimated cost (including estimated loss development and loss adjustment expenses) for (i) cargo loss and damage, (ii) bodily injury and property damage, (iii) group health and (iv) workers’ compensation claims not covered by insurance. The costs for cargo, bodily injury and property damage insurance and claims are included in insurance and claims expense in the Consolidated Statements of Income; the costs of group health and workers’ compensation claims are included in salaries, wages and benefits expense. The insurance and claims accruals are recorded at the estimated ultimate payment amounts. Such insurance and claims accruals are based upon individual case estimates (including negative development) and estimates of incurred-but-not-reported losses using loss development factors based upon past experience. Actual costs related to insurance and claims have not differed materially from estimated accrued amounts for all years presented. An actuary reviews our undiscounted self-insurance reserves for bodily injury and property damage claims and workers’ compensation claims at year-end. For the years ended December 31, 2016, 2015, and 2014 our self-insured retention (“SIR”) and deductible amount for liability claims is $2.0 million plus administrative expenses, for each occurrence involving bodily injury or property damage. We are also responsible for varying annual aggregate amounts of liability for claims in excess of the SIR/deductible. Liability claims in excess of these aggregates are covered under premium-based policies (issued by insurance companies) to coverage levels that our management considers adequate. We are also responsible for administrative expenses for each occurrence involving bodily injury or property damage. Our SIR for workers’ compensation claims is $1.0 million per claim, with premium-based insurance coverage for claims exceeding this amount. We also maintain a $27.3 million bond for the State of Nebraska and a $6.9 million bond for our workers’ compensation insurance carrier. Under these insurance arrangements, we maintained $25.8 million in letters of credit as of December 31, 2016. Revenue Recognition: The Consolidated Statements of Income reflect recognition of operating revenues (including fuel surcharge revenues) and related direct costs when the shipment is delivered. For shipments where a third-party capacity provider (including independent contractors under contract with us) is utilized to provide some or all of the service and we (i) are the primary obligor in regard to the shipment delivery, (ii) establish customer pricing separately from carrier rate negotiations, (iii) generally have discretion in carrier selection and/or (iv) have credit risk on the shipment, we record both revenues for the dollar value of services we bill to the customer and rent and purchased transportation expense for transportation costs we pay to the third-party provider upon the shipment’s delivery. In the absence of the conditions listed above, we record revenues net of those expenses related to third-party providers. Derivative Financial Instrument: We manage our interest rate risk through an interest rate swap. The derivative financial instrument is recognized in the Consolidated Balance Sheets at fair value. The effect on earnings from recognizing the fair value of this derivative financial instrument depends on its intended use, its hedge designation, and its effectiveness in offsetting changes in the fair value of the exposure it is hedging. Changes in the fair value of the instrument designated to reduce or eliminate adverse fluctuations in the fair values of recognized assets and liabilities and unrecognized firm commitments are reported currently in earnings along with changes in the fair values of the hedged items. Changes in the effective portion of the fair value of the instrument used to reduce or eliminate adverse fluctuations in cash flows of anticipated or forecasted transactions is reported in equity as a component of accumulated other comprehensive income (loss), net of income tax effects. Amounts in accumulated other comprehensive income (loss) are reclassified to earnings when the related hedged items affect earnings or the anticipated transactions are no longer probable. Amounts reported in earnings are classified consistent with the item being hedged. Foreign Currency Translation: Local currencies are generally considered the functional currencies outside the United States. Assets and liabilities are translated at year-end exchange rates for operations in local currency environments. Foreign revenues and expense items denominated in the functional currency are translated at the average rates of exchange prevailing during the year. Foreign currency translation adjustments reflect the changes in foreign currency exchange rates applicable to the net assets of the foreign operations. Foreign currency translation adjustments are recorded in accumulated other comprehensive loss within stockholders’ equity in the Consolidated Balance Sheets and as a separate component of comprehensive income in the Consolidated Statements of Comprehensive Income. Income Taxes: We use the asset and liability method in accounting for income taxes. Under this method, deferred tax assets and liabilities are recognized for the future tax consequences attributable to temporary differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using the enacted tax rates that are expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. In accounting for uncertain tax positions, we recognize the tax benefit from an uncertain tax position only if it is more likely than not that the tax position will be sustained on examination by the taxing authorities, based on the technical merits of the position. The tax benefits recognized in the financial statements from such a position are measured based on the largest benefit that has a greater than 50% likelihood of being realized upon ultimate settlement. We recognize interest and penalties directly related to income tax matters in income tax expense. Common Stock and Earnings Per Share: Basic earnings per share is computed by dividing net income by the weighted average number of common shares outstanding during the period. Diluted earnings per share is computed by dividing net income by the weighted average number of common shares outstanding plus the effect of dilutive potential common shares outstanding during the period using the treasury stock method. Dilutive potential common shares include outstanding stock options and restricted stock awards. There are no differences in the numerators of our computations of basic and diluted earnings per share for any periods presented. The computation of basic and diluted earnings per share is shown below (in thousands, except per share amounts).
| Years Ended December 31,
| 2016 |  | 2015 |  | 2014
Net income | $ | 79,129 |  |  | $ | 123,714 |  |  | $ | 98,650 |
Weighted average common shares outstanding | 72,057 |  |  | 71,957 |  |  | 72,122 |
Dilutive effect of stock-based awards | 336 |  |  | 599 |  |  | 616 |
Shares used in computing diluted earnings per share | 72,393 |  |  | 72,556 |  |  | 72,738 |
Basic earnings per share | $ | 1.10 |  |  | $ | 1.72 |  |  | $ | 1.37 |
Diluted earnings per share | $ | 1.09 |  |  | $ | 1.71 |  |  | $ | 1.36 |
There were no options to purchase shares of common stock that were outstanding during the periods indicated above that were excluded from the computation of diluted earnings per share because the option purchase price was greater than the average market price of the common shares during the period. Performance awards are excluded from the calculation of dilutive potential common shares until the threshold performance conditions have been satisfied. Equity Compensation: We have an equity compensation plan that provides for grants of non-qualified stock options, restricted stock, restricted stock units and stock appreciation rights to our associates and directors. We apply the fair value method of accounting for equity compensation awards. Issuances of stock upon an exercise of stock options or vesting of restricted stock are made from treasury stock; shares reacquired to satisfy tax withholding obligations upon vesting of restricted stock are recorded as treasury stock. Grants of stock options, restricted stock, and performance awards vest in increments, and we recognize compensation expense over the requisite service period of each award. We accrue compensation expense for performance awards for the estimated number of shares expected to be issued using the most current information available at the date of the financial statements. If the performance objectives are not met, no compensation expense will be recognized, and any previously recognized compensation expense will be reversed. Comprehensive Income: Comprehensive income consists of net income and other comprehensive income (loss). Other comprehensive income (loss) refers to revenues, expenses, gains and losses that are not included in net income, but rather are recorded directly in stockholders’ equity. For the years ended December 31, 2016, 2015 and 2014, comprehensive income consists of net income, foreign currency translation adjustments and change in fair value of interest rate swap. New Accounting Pronouncements Adopted: In November 2015, the FASB issued ASU No. 2015-17, “Income Taxes: Balance Sheet Classification of Deferred Taxes,” which requires presentation of deferred tax assets and liabilities as non-current in the balance sheet, which simplified the current guidance. Effective January 1, 2016, we early-adopted the guidance and retrospectively adjusted the December 31, 2015 presentation by reclassifying $28.0 million of current deferred tax assets into the non-current liability “Deferred income taxes.” In April 2015, the FASB issued ASU No. 2015-3, “Interest - Imputation of Interest: Simplifying the Presentation of Debt Issuance Costs,” which requires debt issuance costs to be recorded as a direct reduction of the debt liability on the balance sheet rather than as an asset. The provisions of this update became effective for us as of January 1, 2016, and, upon adoption, had no material effect on our consolidated financial position, results of operations or cash flows. Accounting Standards Updates Not Yet Effective: On May 28, 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers,” which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The ASU will replace most existing revenue recognition guidance in U.S. GAAP when it becomes effective. The FASB has also issued ASU No. 2016-08, 2016-10, 2016-11, and 2016-12 in 2016, with additional guidance related to revenue recognition matters. In July 2015, the FASB voted to approve a one-year deferral of the effective date of the new revenue recognition standard and to permit early adoption but no earlier than the original effective date (annual periods beginning after December 15, 2016); such decisions were documented in the FASB’s ASU No. 2015-14 “Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date.” As a result of the deferral, the new standard (as well as ASU No. 2016-08, 2016-10, 2016-11 and 2016-12) will become effective for us beginning January 1, 2018. The standard permits the use of either the retrospective or cumulative effect transition method. We are evaluating the effect that ASU 2014-09 will have on our consolidated financial statements and related disclosures and have not yet selected a transition method. While we cannot yet determine the quantitative impact on our consolidated financial statements, we currently expect the new standard to affect the timing of revenue recognition. Today we recognize revenue and related direct costs when the shipment is delivered. The new standard will require us to recognize revenue over time. In July 2015, the FASB issued ASU No. 2015-11, “Inventory: Simplifying the Measurement of Inventory,” which requires inventory to be recorded at the lower of cost and net realizable value (instead of lower of cost or market). The provisions of this update are effective as of January 1, 2017, and are not expected to have a material effect on our consolidated financial position, results of operations or cash flows, as nearly all of our inventory is recorded at cost. In February 2016, the FASB issued ASU No. 2016-02, “Leases,” to increase transparency and comparability by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. The provisions of this update are effective for fiscal years beginning after December 15, 2018. We are evaluating the effect that ASU No. 2016-02 will have on our consolidated financial position, results of operations and cash flows. In March 2016, the FASB issued ASU No. 2016-09, “Compensation - Stock Compensation: Improvements to Employee Share-Based Payment Accounting,” to simplify several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. The provisions of this update are effective for fiscal years beginning after December 15, 2016 and are not expected to have a material effect on our consolidated financial position, results of operations, or cash flows. In August 2016, the FASB issued ASU No. 2016-15, “Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments,” which addresses eight specific cash flow issues with the objective of reducing the existing diversity in practice. The provisions of this update are effective for fiscal years beginning after December 15, 2017. We are evaluating the effect that ASU No. 2016-15 will have on our consolidated cash flows. In November 2016, the FASB issued ASU No. 2016-18, “Statement of Cash Flows - (Topic 230) Restricted Cash (a Consensus of the FASB Emerging Issues Task Force),” which requires an entity to include in its cash and cash-equivalent balances in the statement of cash flows those amounts that are deemed to be restricted cash and restricted cash equivalents. The provisions of this update are effective for fiscal years beginning after December 15, 2017. We are evaluating the effect ASU No. 2016-18 will have on our consolidated cash flows and related disclosures. Other ASUs not identified above and which are not effective until after December 31, 2016 are not expected to have a material effect on our consolidated financial position, results of operations or cash flows.

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