Summary of Significant Accounting Policies | NOTE 1—SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Nature of Operations Headquartered in Southfield, Michigan, the principal business of Superior Industries International, Inc. (referred to herein as “Superior”, the “Company” or “we,” “us” and “our”) is the design and manufacture of aluminum wheels for sale to original equipment manufacturers (“OEMs”). We are one of the largest suppliers of cast aluminum wheels to the world’s leading automobile and light truck manufacturers, with manufacturing operations in the United States, Mexico, Germany and Poland. Customers in North America and Europe represent the principal markets for our products. On May 30, 2017, we acquired Uniwheels, a large European supplier of OEM aluminum wheels, as well as a supplier of European aftermarket wheels, which we believe is viewed as one of the technological leaders in the market for alloy wheels. As a result of the Uniwheels acquisition, we have determined that our North American and European businesses should be treated as separate reportable segments in view of differences in economic circumstances, markets and customers as further described in Note 6, “Business Segments”. Presentation of Consolidated Financial Statements The consolidated financial statements include the accounts of the company and its wholly owned subsidiaries. All intercompany transactions are eliminated in consolidation. We have made a number of estimates and assumptions related to the reporting of assets, liabilities, revenues and expenses to prepare these financial statements in conformity with U.S. GAAP as delineated by the FASB in its ASC. Generally, assets and liabilities that are subject to estimation and judgment include the allowance for doubtful accounts, inventory valuation, amortization of preproduction costs, impairment of and the estimated useful lives of our long-lived assets, intangible assets and goodwill, self-insurance portions of employee benefits, workers’ compensation and general liability programs, fair value of stock-based compensation, income tax liabilities and deferred income taxes. While actual results could differ, we believe such estimates to be reasonable. The fiscal year for 2017 consisted of the 53-week 52-week Cash and Cash Equivalents Cash and cash equivalents generally consist of cash, certificates of deposit and fixed deposits and money market funds with original maturities of three months or less. Our cash and cash equivalents are not subject to significant interest rate risk due to the short maturities of these investments. Certificates of deposit and fixed deposits whose original maturity is greater than three months and is one year or less are classified as short-term investments and certificates of deposit and fixed deposits whose maturity is greater than one year at the balance sheet date are classified as non-current non-current year-end, Restricted Deposits We purchase certificates of deposit that mature within twelve months and are used to secure or collateralize letters of credit securing our workers’ compensation obligations. At December 31, 2017 and 2016, certificates of deposit totaling $0.8 million were restricted in use and were classified as short-term investments on our consolidated balance sheet. Derivative Financial Instruments and Hedging Activities In order to hedge exposure related to fluctuations in foreign currency rates and the cost of certain commodities used in the manufacture of our products, we periodically may purchase derivative financial instruments such as forward contracts, options or collars to offset or mitigate the impact of such fluctuations. Programs to hedge currency rate exposure may address ongoing transactions including, foreign-currency-denominated receivables and payables, as well as specific transactions related to purchase obligations. Programs to hedge exposure to commodity cost fluctuations would be based on underlying physical consumption of such commodity. We account for our derivative instruments as either assets or liabilities and carry them at fair value. For derivative instruments that hedge the exposure to variability in expected future cash flows that are designated as cash flow hedges, the effective portion of the gain or loss on the derivative instrument is reported as a component of accumulated other comprehensive income or loss in shareholders’ equity and reclassified into income in the same period or periods during which the hedged transaction affects earnings. The ineffective portion of the gain or loss on the derivative instrument, if any, is recognized in current income. To receive hedge accounting treatment, cash flow hedges must be highly effective in offsetting changes to expected future cash flows on hedged transactions. For forward exchange contracts designated as cash flow hedges, changes in the time value are included in the definition of hedge effectiveness. Accordingly, any gains or losses related to this component are reported as a component of accumulated other comprehensive income or loss in shareholders’ equity and reclassified into income in the same period or periods during which the hedged transaction affects earnings. Derivatives that do not qualify as hedges are adjusted to fair value through current income. See Note 5, “Derivative Financial Instruments” for additional information pertaining to our derivative instruments. We enter into contracts to purchase certain commodities used in the manufacture of our products, such as aluminum, natural gas and other raw materials. These contracts are considered to be derivative instruments under U.S. GAAP. However, upon entering into these contracts, we expect to fulfill our purchase commitments and take full delivery of the contracted quantities of these commodities during the normal course of business. Accordingly, under U.S. GAAP, these purchase contracts are not accounted for as derivatives because they qualify for the normal purchase normal sale exception under U.S. GAAP, unless there is a change in the facts or circumstances that causes management to believe that these commitments would not be used in the normal course of business. See Note 20, “Risk Management” for additional information pertaining to these purchase commitments. Cash Paid for Interest and Taxes and Non-Cash Cash paid for interest was $24.3 million, $0.3 million and $0.3 million for the years ended December 31, 2017, 2016 and 2015. Cash paid for income taxes was $11.1 million, $21.9 million and $12.6 million for the years ended December 31, 2017, 2016 and 2015. As of December 31, 2017, 2016 and 2015, $15.1 million, $4.0 million and $1.1 million, respectively, of equipment had been purchased but not yet paid for and are included in accounts payable and accrued expenses in our consolidated balance sheets. Accounts Receivable We maintain an allowance for doubtful accounts receivable based upon the expected collectability of all trade receivables. The allowance is reviewed continually and adjusted for amounts deemed uncollectible by management. Inventories Inventories, which are categorized as raw materials, work-in-process first-in, first-out Property, Plant and Equipment Property, plant and equipment are carried at cost, less accumulated depreciation. The cost of additions, improvements and interest during construction, if any, are capitalized. Our maintenance and repair costs are charged to expense when incurred. Depreciation is calculated generally on the straight-line method based on the estimated useful lives of the assets. Classification Expected Useful Life Computer equipment 3 to 5 years Production machinery and technical equipment 3 to 20 years Buildings 15 to 50 years Other equipment, operating and office equipment 3 to 20 years When property, plant and equipment is replaced, retired or disposed of, the cost and related accumulated depreciation are removed from the accounts. Property, plant and equipment no longer used in operations, which are generally insignificant in amount, are stated at the lower of cost or estimated net realizable value. Gains and losses, if any, are recorded as a component of operating income if the disposition relates to an operating asset. If a non-operating Preproduction Costs and Revenue Recognition Related to Long-Term Supply Arrangements We incur preproduction engineering and tooling costs related to the products produced for our customers under long-term supply agreements. We expense all preproduction engineering costs for which reimbursement is not contractually guaranteed by the customer or which are in excess of the contractually guaranteed reimbursement amount. We amortize the cost of the customer-owned tooling over the expected life of the wheel program on a straight-line basis. Also, we defer any reimbursements made to us by our customer and recognize the tooling reimbursement revenue over the same period in which the tooling is in use. Changes in the facts and circumstances of individual wheel programs may accelerate the amortization of both the cost of customer-owned tooling and the deferred tooling reimbursement revenues. Recognized tooling reimbursement revenues, which totaled $11.9 million, $8.0 million and $5.8 million in 2017, 2016 and 2015, respectively, are included in net sales in the consolidated income statements. The following tables summarize the unamortized customer-owned tooling costs included in our other non-current non-current December 31, 2017 2016 (Dollars in Thousands) Customer-Owned Tooling Costs Preproduction costs $ 84,198 $ 78,299 Accumulated amortization (71,409 ) (65,100 ) Net preproduction costs $ 12,789 $ 13,199 Deferred Tooling Revenue Accrued expenses $ 4,654 $ 5,419 Other non-current 1,974 2,593 Total deferred tooling revenue $ 6,628 $ 8,012 Impairment of Goodwill Goodwill must be tested on at least an annual basis, and as of an interim period if an event or circumstance indicates that an impairment is more likely than not to have occurred. In conducting our annual impairment testing, we may first perform a qualitative assessment of whether it is more likely than not that a reporting unit’s fair value is less than its carrying amount. If not, no further goodwill impairment testing is performed. If it is more likely than not that a reporting unit’s fair value is less than its carrying amount, or if we elect not to perform a qualitative assessment of a reporting unit, we compare the fair value of the reporting unit to the related net book value. If the net book value of a reporting unit exceeds its fair value, an impairment loss is measured and recognized. We conduct our annual impairment testing as of December 31 of each year. Impairment of Long-Lived Assets and Investments In accordance with ASC 360 entitled “Property, Plant and Equipment”, management evaluates the recoverability and estimated remaining lives of long-lived assets. The company reviews long-lived assets for impairment whenever facts and circumstances suggest that the carrying value of the assets may not be recoverable or the useful life has changed. When facts and circumstances indicate that there may have been a loss in value, management will also evaluate its cost method investments to determine whether there was an other-than-temporary impairment. If a loss in the value of the investment is determined to be other than temporary, then the decline in value is recognized as a loss. Foreign Currency Transactions and Translation We have wholly-owned foreign subsidiaries with operations in Mexico and Europe whose functional currency is the peso and Euro, respectively. In addition, we have operations with U.S. dollar functional currency with transactions denominated in pesos and other currencies and operations in Europe with Euro functional currency with transactions denominated in Polish Zlotys and other currencies. These operations had monetary assets and liabilities that were denominated in currencies that were different than their functional currency and were translated into the functional currency of the entity using the exchange rate in effect at the end of each accounting period. Any gains and losses recorded as a result of the remeasurement of monetary assets and liabilities into the functional currency are reflected as transaction gains and losses and included in other expense, net in the consolidated income statements. We had foreign currency transaction gains of $12.9 million in 2017 and losses of $0.4 million and $1.2 million in 2016 and 2015, respectively, which are included in other income (expense), net in the consolidated income statements. In addition, we had a minority investment in India that had a functional currency of the Indian rupee which was divested in September 2017. When our foreign subsidiaries translate their financial statements from the functional currency to the reporting currency, the balance sheet accounts are translated using the exchange rates in effect at the end of the accounting period and retained earnings is translated using historical rates. The income statement accounts are generally translated at the weighted average of exchange rates during the period and the cumulative effect of translation is recorded as a separate component of accumulated other comprehensive income or loss in shareholders’ equity, as reflected in the consolidated statements of shareholders’ equity. The value of the Mexican peso and Euro increased 5.1 percent and 7.2 percent, respectively, in relation to the U.S. dollar, while the Zloty remained essentially flat in relation to the Euro in 2017. Revenue Recognition Sales of products and any related costs are recognized when title and risk of loss transfers to the purchaser, generally upon shipment. Tooling reimbursement revenues related to initial tooling reimbursed by our customers are deferred and recognized over the expected life of the wheel program on a straight-line basis, as discussed above. Research and Development Research and development costs (primarily engineering and related costs) are expensed as incurred and are included in cost of sales in the consolidated income statements. Amounts expensed during 2017, 2016 and 2015 were $7.7 million, $3.8 million and $2.6 million, respectively. Value-Added Taxes Value-added taxes that are collected from customers and remitted to taxing authorities are excluded from sales and cost of sales. Stock-Based Compensation We account for stock-based compensation using the estimated fair value recognition method in accordance with U.S. GAAP. We recognize these compensation costs net of the applicable forfeiture rate and recognize the compensation costs for only those shares expected to vest on a straight-line basis over the requisite service period of the award, which is generally the vesting term of three to four years. We estimate the forfeiture rate based on our historical experience. See Note 18, “Stock-Based Compensation” for additional information concerning our share-based compensation awards. Income Taxes We account for income taxes using the asset and liability method. The asset and liability method requires the recognition of deferred tax assets and liabilities for expected future tax consequences of temporary differences that currently exist between the tax basis and financial reporting basis of our assets and liabilities. We calculate current and deferred tax provisions based on estimates and assumptions that could differ from actual results reflected on the income tax returns filed during the following years. Adjustments based on filed returns are recorded when identified in the subsequent years. The effect on deferred taxes for a change in tax rates is recognized in income in the period that the tax rate change is enacted. In assessing the realizability of deferred tax assets, we consider whether it is more likely than not that some portion of the deferred tax assets will not be realized. A valuation allowance is provided for deferred income tax assets when, in our judgment, based upon currently available information and other factors, it is more likely than not that all or a portion of such deferred income tax assets will not be realized. The determination of the need for a valuation allowance is based on an on-going In determining when to release the valuation allowance established against our net deferred income tax assets, we consider all available evidence, both positive and negative. Consistent with our policy, the valuation allowance against our net deferred income tax assets will not be reversed until such time as we have generated three years of cumulative pre-tax pre-tax We account for uncertain tax positions utilizing a two-step more-likely-than-not more-likely-than-not Presently, we have not recorded a deferred tax liability for temporary differences related to investments in foreign subsidiaries that are essentially permanent in duration. These temporary differences may become taxable upon a repatriation of earnings from the subsidiaries or a sale or liquidation of the subsidiaries. At this time the company does not have any plans to repatriate income from its foreign subsidiaries. Earnings (Loss) Per Share As summarized below, basic earnings (loss) per share is computed by dividing net income (loss) attributable to Superior, less preferred dividends, by the weighted average number of common shares outstanding for the period. For purposes of calculating diluted earnings per share, net income is divided by the total of the weighted average shares outstanding plus the dilutive effect outstanding stock options and restricted stock under the treasury stock method, which includes consideration of stock-based compensation required by U.S. GAAP. The redeemable convertible preferred stock has been excluded from the weighted average shares since inclusion would be antidilutive. Accordingly, preferred stock dividends (including accretion of the preferred stock redemption premium which has been treated as deemed dividends) have been deducted from net income. Year Ended December 31, 2017 2016 2015 (Dollars in thousands, except per share amounts) Basic Earnings (Loss) Per Share Net income (loss) attributable to Superior $ (6,203 ) $ 41,381 $ 23,944 Less: Redeemable preferred stock dividends and accretion (18,912 ) — — Basic Numerator (25,115 ) 41,381 23,944 Weighted average shares outstanding - basic 24,929 25,439 26,599 Basic (loss) earnings per share $ (1.01 ) $ 1.63 $ 0.90 Diluted Earnings Per Share Net income (loss) attribute to Superior $ (6,203 ) $ 41,381 $ 23,944 Less: Redeemable preferred stock dividends and accretion (18,912 ) — — Diluted Numerator (25,115 ) 41,381 23,944 Weighted average shares outstanding - basic 24,929 25,439 26,599 Weighted average dilutive stock options and restricted stock — 100 34 Weighted average shares outstanding - diluted 24,929 25,539 26,633 Diluted (loss) earnings per share $ (1.01 ) $ 1.62 $ 0.90 For the year ended December 31, 2017, no options or restricted stock were included in the diluted earnings per share calculation because to do so would have been anti-dilutive. All stock options and restricted stock have been included in the diluted earnings per share calculations for the year ended December 31, 2016, but for the year ended December 31, 2015, we have excluded options to purchase 147,150 shares at prices ranging from $21.84 to $22.57 because exercise prices exceeded average market price and as a consequence they were antidilutive. In addition, the performance shares discussed in Note 18, “Stock-Based Compensation” are not included in the diluted income per share because the performance metrics had not been met as of December 31, 2017. New Accounting Pronouncements In May 2014, the FASB issued ASU 2014-09, In February of 2016, the FASB issued ASU 2016-02, 2016-02”). 2016-02 right-of-use 2016-02 2016-02 In August 2016, the FASB issued an ASU entitled “Statement of Cash Flows (Topic 740): Classification of Certain Cash Receipts and Cash Payments.” The objective of the ASU is to address the diversity in practice in the presentation of certain cash receipts and cash payments in the statement of cash flows. This ASU is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. We are evaluating the impact this guidance will have on our statement of cash flows. In January 2017, the FASB issued an ASU entitled “Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment.” The objective of the ASU is to simplify how an entity is required to test goodwill for impairment by eliminating Step 2 from the goodwill impairment test. Step 2 measures a goodwill impairment loss by comparing the implied fair value of a reporting unit’s goodwill with the carrying amount of that goodwill. This ASU is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted. We are evaluating the impact this guidance will have on our financial position and results of operations. In January 2017, the FASB issued an ASU entitled “Business Combinations (Topic 805): Clarifying the Definition of a Business.” The objective of the ASU is to add guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. This ASU is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. We will apply this guidance in the future as applicable. In March 2017, the FASB issued an ASU entitled “Compensation-Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost.” The objective of the ASU is to improve the reporting of net benefit cost in the financial statements. This ASU is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. We are evaluating the impact this guidance will have on our financial position and results of operations. In July 2017, the FASB issued an ASU entitled “(Part I) Accounting for Certain Financial Instruments with Down Round Features, (Part II) Replacement of the Indefinite Deferral for Mandatorily Redeemable Financial instruments of Certain Nonpublic Entities and Certain Mandatorily Redeemable Noncontrolling Interests with a Scope Exception”. The objective of this ASU is to reduce the complexity in accounting for certain financial instruments with down round features. When determining whether certain financial instruments should be classified as debt or equity instruments, a down round feature would no longer preclude equity classification when assessing whether the instrument is indexed to an entity’s own stock. As a result, a freestanding equity-linked financial instrument (or embedded conversion option) no longer would be accounted for as a derivative liability at fair value as a result of the existence of a down round feature. We are evaluating the impact this guidance will have on our financial position and results of operations. In August 2017, the FASB issued an ASU entitled “Derivatives and Hedging (Topic 815).” The objective of this standard is to better align financial reporting with risk management activities, provide a more faithful representation of hedging activities and reduce complexity and costs associated with hedging. This ASU removes the requirement to recognize hedge ineffectiveness in income prior to settlement, allows documentation of hedge effectiveness at inception to be completed by quarter-end, non-financial On December 22, 2017, The Securities and Exchange Commission issued Staff Accounting Bulletin No. 118 (SAB 118) to provide guidance regarding accounting and disclosure for tax effects arising from changes in tax regulations under the Tax Cuts and Jobs Act (the “Act”) enacted December 22, 2017. The Act contains significant changes to corporate taxation, including reduction in the corporate tax rate from 35 percent to 21 percent, a one-time |