Superior Industries International (SUP) 10-Q 13 Nov 17 2017 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Oct. 01, 2017	Nov. 09, 2017
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Oct. 1, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q3
Trading Symbol	SUP
Entity Registrant Name	SUPERIOR INDUSTRIES INTERNATIONAL INC
Entity Central Index Key	95,552
Current Fiscal Year End Date	--12-25
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		24,907,458

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2017	Sep. 25, 2016	Oct. 01, 2017	Sep. 25, 2016
Income Statement [Abstract]
NET SALES	$ 331,404	$ 175,580	$ 746,252	$ 544,354
Cost of sales	307,511	164,537	682,920	475,869
Restructuring costs (Note 4)	0	62	130	249
Cost of sales, including restructuring costs	307,511	164,599	683,050	476,118
GROSS PROFIT	23,893	10,981	63,202	68,236
Selling, general and administrative expenses	18,135	5,731	55,498	24,724
INCOME FROM OPERATIONS	5,758	5,250	7,704	43,512
Interest (expense) income, net	(13,422)	41	(28,447)	152
Other income (expense), net	3,082	(381)	10,220	(486)
Change in fair value of redeemable preferred stock embedded derivative liability	4,081	0	4,081	0
CONSOLIDATED (LOSS) INCOME BEFORE INCOME TAXES	(501)	4,910	(6,442)	43,178
Income tax benefit (provision)	3,355	1,064	4,880	(9,576)
CONSOLIDATED NET INCOME (LOSS)	2,854	5,974	(1,562)	33,602
Less: Net (income) loss attributable to non-controlling interest	(239)	0	8	0
NET INCOME (LOSS) ATTRIBUTABLE TO SUPERIOR	$ 2,615	$ 5,974	$ (1,554)	$ 33,602
(LOSS) EARNINGS PER SHARE ATTRIBUTABLE TO SUPERIOR- BASIC	$ (0.22)	$ 0.24	$ (0.50)	$ 1.32
(LOSS) EARNINGS PER SHARE ATTRIBUTABLE TO SUPERIOR- DILUTED	(0.22)	0.23	(0.50)	1.31
DIVIDENDS DECLARED PER SHARE	$ 0.09	$ 0.18	$ 0.36	$ 0.54

Condensed Consolidated Stateme3

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2017	Sep. 25, 2016	Oct. 01, 2017	Sep. 25, 2016
Statement of Comprehensive Income [Abstract]
Net income (loss) attributable to Superior	$ 2,615	$ 5,974	$ (1,554)	$ 33,602
Other comprehensive income (loss), net of tax:
Foreign currency translation gain (loss), net of tax	8,149	(4,211)	31,494	(12,877)
Change in unrecognized (losses) gains on derivative instruments:
Change in fair value of derivatives	(2,189)	(2,545)	25,773	(7,961)
Tax provision	0	0	(335)	(266)
Change in unrecognized (losses) gains on derivative instruments, net of tax	(2,189)	(2,545)	25,438	(8,227)
Defined benefit pension plan:
Actuarial gains on pension obligation, net of curtailments and amortization	88	84	273	252
Tax provision	(25)	(31)	(74)	(93)
Pension changes, net of tax	63	53	199	159
Other comprehensive income (loss), net of tax	6,023	(6,703)	57,131	(20,945)
Comprehensive income (loss) attributable to Superior	$ 8,638	$ (729)	$ 55,577	$ 12,657

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Oct. 01, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 30,424	$ 57,786
Short-term investments	750	750
Accounts receivable, net	174,294	99,331
Inventories	178,097	82,837
Income taxes receivable	7,304	3,682
Other current assets	19,965	9,695
Total current assets	410,834	254,081
Property, plant and equipment, net	518,258	227,403
Investment in unconsolidated affiliate	0	2,000
Deferred income tax assets, net	60,350	28,838
Goodwill	321,671	0
Intangibles	213,524	0
Other non-current assets	38,718	30,434
Total assets	1,563,355	542,756
Current liabilities:
Accounts payable	98,941	37,856
Short term debt	5,800	0
Accrued expenses	67,861	46,315
Income taxes payable	1,724	1,793
Total current liabilities	174,326	85,964
Long-term debt (less current portion)	675,104	0
Embedded derivative liability	6,768	0
Non-current income tax liabilities	5,719	5,301
Deferred income tax liabilities, net	34,799	3,628
Other non-current liabilities	41,961	49,637
Mezzanine equity:
Preferred stock, $.01 par value Authorized - 1,000,000 shares; issued and outstanding - 150,000 shares (no shares at December 25, 2016)	140,641	0
Shareholders' equity:
Common stock, $.01 par value Authorized - 100,000,000 shares; Issued and outstanding - 24,903,622 shares (25,143,950 shares at December 25, 2016)	88,705	89,916
Accumulated other comprehensive loss	(67,794)	(124,925)
Retained earnings	407,265	433,235
Superior shareholders' equity	428,176	398,226
Noncontrolling interests	55,861
Total shareholders' equity	484,037	398,226
Total liabilities, mezzanine and shareholders' equity	$ 1,563,355	$ 542,756

Condensed Consolidated Balance5

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Oct. 01, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	150,000	0
Preferred stock, shares outstanding	150,000	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	24,903,622	25,143,950
Common stock, shares outstanding	24,903,622	25,143,950

Condensed Consolidated Stateme6

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Oct. 01, 2017	Sep. 25, 2016
Statement of Cash Flows [Abstract]
NET CASH (USED IN) PROVIDED BY OPERATING ACTIVITIES	$ 17,170	$ 39,261
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to property, plant and equipment	(56,826)	(30,165)
Acquisition of Uniwheels, net of cash acquired	(701,224)	0
Proceeds from sales and maturities of investments	0	200
Proceeds from sale of property, plant and equipment	118	1
NET CASH USED IN INVESTING ACTIVITIES	(757,932)	(29,964)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of long-term debt	975,571	0
Proceeds from issuance of redeemable preferred shares	150,000	0
Debt repayment	(321,103)	0
Cash dividends paid	(13,340)	(13,783)
Cash paid for common stock repurchase	(5,014)	(13,527)
Payments related to tax withholdings for stock-based compensation	(1,467)	0
Net increase (decrease) in short term debt	(9,032)	0
Proceeds from borrowings on revolving credit facility	70,750	0
Repayments on borrowings on revolving credit facility	(99,650)	0
Proceeds from exercise of stock options	41	1,616
Redeemable preferred shares issuance costs	(3,737)	0
Financing costs paid	(30,460)	0
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	712,559	(25,694)
Effect of exchange rate changes on cash	841	162
Net decrease in cash and cash equivalents	(27,362)	(16,235)
Cash and cash equivalents at the beginning of the period	57,786	52,036
Cash and cash equivalents at the end of the period	$ 30,424	$ 35,801

Condensed Consolidated Stateme7

Condensed Consolidated Statement of Shareholders' Equity - 9 months ended Oct. 01, 2017 - USD ($) $ in Thousands	Total	Common Stock	Unrecognized Gains (Losses) on Derivative Instruments	Pension Obligations	Cumulative Translation Adjustment	Retained Earnings	Non-controlling Interest
Beginning of period at Dec. 31, 2016	$ 398,226	$ 89,916	$ (16,101)	$ (3,636)	$ (105,188)	$ 433,235
Beginning of the period (in shares) at Dec. 31, 2016	25,143,950	25,143,950
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated net (loss)	$ (1,562)		0	0	0	(1,554)	$ (8)
Change in unrecognized gains (losses) on derivative instruments, net of tax	25,438		25,438	0	0	0	0
Change in employee benefit plans, net of taxes	199		0	199	0	0	0
Net foreign currency translation adjustment	34,683		0	0	31,494	0	3,189
Stock options exercised	$ 0		0	0	0	0	0
Stock options exercised (in shares)	2,000	2,000
Restricted stock awards granted, net of forfeitures	$ 0	$ 0	0	0	0	0	0
Restricted stock awards granted, net of forfeitures (in shares)		30,354
Stock-based compensation expense	(434)	$ (434)	0	0	0	0	0
Stock-based compensation expense (in shares)		(56,841)
Common stock repurchased	(5,014)	$ (777)	0	0	0	(4,237)	0
Common stock repurchased (in shares)		(215,841)
Cash dividends declared	(9,150)		0	0	0	(9,150)	0
Redeemable preferred dividend and accretion	(11,029)					(11,029)
Non-controlling interest	63,200		0	0	0	0	63,200
Uniwheels second tender	(10,520)		0	0	0	0	(10,520)
End of period at Oct. 01, 2017	$ 484,037	$ 88,705	$ 9,337	$ (3,437)	$ (73,694)	$ 407,265	$ 55,861
End of the period (in shares) at Oct. 01, 2017	24,903,622	24,903,622

Nature of Operations

Nature of Operations	9 Months Ended
	Oct. 01, 2017
Accounting Policies [Abstract]
Nature of Operations	Note 1 – Nature of Operations Headquartered in Southfield, Michigan, the principal business of Superior Industries International, Inc. (referred to herein as 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 North America and Europe. Customers in North America and Europe represent the principal market for our products. Our largest customers, Ford Motor Company (“Ford”), General Motors Company (“GM”) and Toyota Motor Company (“Toyota”) each accounted for more than 10 percent of our consolidated sales in the first nine months of 2017 and together represented approximately 56 percent of our trade sales during the first nine months of 2017. Additionally, Nissan Motor Co., Ltd. (“Nissan”) and Fiat Chrysler Automotive N.V. (“FCA”) individually accounted for 6 percent and 4 percent, respectively, of our consolidated sales during the first nine months of 2017 and together with Ford, GM and Toyota represented approximately 66 percent of our trade sales during the first nine months of 2017. We also manufacture aluminum wheels for BMW, Mazda, Subaru, Tesla and Volkswagen. Additionally, the acquisition of Uniwheels AG (“Uniwheels”) on May 30, 2017 diversifies our OEM customer base to include Audi AG (“Audi”), Mercedes-Benz, Demand for automobiles and light trucks (including SUVs and crossover vehicles) in the North American and European markets is subject to many unpredictable factors such as changes in the general economy, gasoline prices, consumer credit availability and interest rates. Demand for aluminum wheels can be further affected by other factors, including pricing and performance compared to competitive materials such as steel. Additionally, the demand for our products is influenced by shifts of market share between vehicle manufacturers and the specific market penetration of individual vehicle platforms being sold by our customers.

Presentation of Condensed Conso

Presentation of Condensed Consolidated Financial Statements	9 Months Ended
	Oct. 01, 2017
Accounting Policies [Abstract]
Presentation of Condensed Consolidated Financial Statements	Note 2 – Presentation of Condensed Consolidated Financial Statements During interim periods, we follow the accounting policies set forth in our Annual Report on Form 10-K 10-K”) 10-Q 10-K. In the past, Superior has used a 4-4-5 quarter-end The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with the SEC’s requirements for quarterly reports on Form 10-Q Interim financial reporting standards require us to make estimates that are based on assumptions regarding the outcome of future events and circumstances not known at that time, including the use of estimated effective tax rates. Inevitably, some assumptions will not materialize, unanticipated events or circumstances may occur which vary from those estimates and such variations may significantly affect our future results. Additionally, interim results may not be indicative of our results for future interim periods or our annual results. New Accounting Pronouncements In May 2014, the FASB issued Accounting Standards Update (“ASU”) “Revenue from Contracts with Customers.” This update outlines a single, comprehensive model for accounting for revenue from contracts with customers. We plan to adopt this update on January 1, 2018. The guidance permits two methods of adoption: retrospectively to each prior reporting period presented (full retrospective method), or retrospectively with the cumulative effect of initially applying the guidance recognized at the date of initial application (modified retrospective method). We anticipate adopting the standard using the modified retrospective method. There may be differences in timing of revenue recognition under the new standard compared to recognition under ASC 605 - Revenue Recognition. We have completed an initial assessment of our North America operations and are currently reviewing our Europe operations that we acquired in the second quarter. 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. Early adoption is permitted. We are evaluating the impact this guidance will have on our statement of cash flows. In October 2016, the FASB issued an ASU entitled “Income Taxes (Topic 230): Intra-Entity Transfers of Assets Other than Inventory.” The objective of the ASU is to improve the accounting for the income tax consequences of intra-entity transfers of assets other than inventory. This ASU is effective for fiscal years beginning after December 15, 2017, 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 statement of operations. In November 2016, the FASB issued an ASU entitled “Statement of Cash Flows (Topic 230): Restricted Cash.” The objective of the ASU is to address the diversity in practice that exists in the classification and presentation of changes in restricted cash on the statement of cash flows. This ASU is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Early adoption is permitted. 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 statement 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. Early adoption is permitted. We are evaluating the impact this guidance will have on our financial position and statement of operations. 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. Early adoption is permitted. We are evaluating the impact this guidance will have on our financial position and statement 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. Early adoption is permitted. We are evaluating the impact this guidance will have on our financial position and statement 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

Acquisition

Acquisition	9 Months Ended
	Oct. 01, 2017
Business Combinations [Abstract]
Acquisition	Note 3 – Acquisition On March 23, 2017, Superior announced that it had entered into various agreements to commence a tender offer to acquire 100 percent of the outstanding equity interests of Uniwheels (the “Acquisition”) through a newly-formed, wholly-owned subsidiary (the “Acquisition Sub”). The Acquisition will be effected through a multi-step process as more fully described below. In the first step of the Acquisition, on March 23, 2017, Superior obtained a commitment from the owner of approximately 61 percent of the outstanding stock of Uniwheels, Uniwheels Holding (Malta) Ltd. (the “Significant Holder”), evidenced by an irrevocable undertaking agreement (the “Undertaking Agreement”) to tender such stock in the second step of the Acquisition. In connection with the Undertaking Agreement, on March 23, 2017: (i) Superior entered into a business combination agreement with Uniwheels pursuant to which, subject to the provisions of the German Stock Corporation Act, Uniwheels and its subsidiaries undertook to, among other things, cooperate with the financing of the Acquisition; and (ii) Superior and the Significant Holder entered into a guarantee and indemnification agreement pursuant to which Superior will hold the Significant Holder harmless for claims that may arise relating to its involvement with Uniwheels. As Uniwheels is a company listed on the Warsaw Stock Exchange, the Acquisition was required to be carried out in accordance with the Polish Act of 29 July 2005 on Public Offerings and the Conditions for Introducing Financial Instruments to Organized Trading and Public Companies (the “Public Offering Act”). Following the publication of a formal tender offer document by Superior, as required by the Public Offering Act, Superior commenced the acceptance period for the tender offer (the “Tender Offer”) on April 12, 2017, pursuant to which, Superior offered to purchase all (but not less than 75 percent) of the outstanding stock of Uniwheels and, upon the consummation of the Tender Offer, agreed to purchase the stock of the Significant Holder along with all other stock of Uniwheels tendered pursuant to the Tender Offer. On May 30, 2017, Superior acquired 92.3 percent of the outstanding stock of Uniwheels for approximately $703.0 million (based on an exchange rate of 1.00 Dollar = 3.74193 Polish Zloty). We refer to this acquisition as the “First Step Acquisition.” Under the terms of the Tender Offer: • the Significant Holder received cash consideration of Polish Zloty 226.5 per share; and • Uniwheels’ other shareholders received cash consideration of Polish Zloty 247.87 per share, equivalent to the volume weighted-average-price of Uniwheels’ shares for the three months prior to commencement of the Tender Offer, plus 5.0 percent. On June 30, 2017, the company announced that it had commenced the delisting and associated tender process for the remaining outstanding shares of Uniwheels. As of July 31, 2017, 153,251 additional shares (representing 1.2 percent of Uniwheels shares) were tendered at Polish Zloty 247.87 per share. We refer to this acquisition as the “Second Step Acquisition.” The aggregate equity purchase price of the Acquisition (assuming the remaining 6.5 percent of Uniwheels’ stock is acquired for cash consideration of Polish Zloty 247.87 per share, the price paid to Uniwheels’ shareholders in the Tender Offer, and an exchange rate of 1.00 Dollar = 3.74193 Polish Zloty) will be approximately $778.0 million. We entered into foreign currency hedges prior to the closing of the First Step Acquisition intended to reduce currency risk associated with the settlement of the Tender Offer (the “Hedging Transactions”). The net benefit of such Hedging Transactions to Superior reduced the total anticipated purchase price of the Acquisition to $766.2 million. The company’s condensed consolidated financial statements for the three and nine month periods ended October 1, 2017 and September 25, 2016 include Uniwheels results of operations subsequent to May 30, 2017 (please see Note 7, “Business Segments” for the segment results included within the condensed consolidated financial statements for the three and nine month periods ended October 1, 2017 and September 25, 2016, which include Uniwheels results of operations subsequent to May 30, 2017). The company’s condensed consolidated financial statements reflect the purchase accounting adjustments in accordance with ASC 805 “Business Combinations”, whereby the purchase price was allocated to the assets acquired and liabilities assumed based upon their estimated fair values on the acquisition date. During the second quarter of 2017, the company determined a preliminary valuation of the identifiable assets acquired and the liabilities assumed. The following is the allocation of the purchase price: (Dollars in thousands) Estimated purchase price Cash consideration $ 703,000 Non-controlling 63,200 Preliminary purchase price allocation Cash and cash equivalents 12,296 Accounts receivable 60,580 Inventories 82,402 Prepaid expenses and other current assets 11,479 Total current assets 166,757 Property and equipment 250,000 Intangible assets (1) 212,000 Goodwill 306,154 Other assets 20,937 Total assets acquired 955,848 Accounts payable 61,883 Other current liabilities 40,361 Total current liabilities 102,244 Other long-term liabilities 87,404 Total liabilities assumed 189,648 Net assets acquired $ 766,200 (1) Intangible assets are recorded at estimated fair value, as determined by management based on available information which includes a preliminary valuation prepared by an independent third party. The fair values assigned to identifiable intangible assets were determined through the use of the income approach, specifically the relief from royalty and multi-period excess earnings methods. The major assumptions used in arriving at the estimated identifiable intangible asset values included management’s estimates of future cash flows, discounted at an appropriate rate of return which are based on the weighted average cost of capital for both the company and other market participants. The useful lives for intangible assets were determined based upon the remaining useful economic lives of the intangible assets that are expected to contribute directly or indirectly to future cash flows. The estimated fair value of intangible assets and related useful lives as included in the preliminary purchase price allocation include: Estimated Fair Estimated (Dollars in thousands) Brand name $ 9,000 5-6 Technology 16,000 4-6 Customer relationships 167,000 6-11 Trade names 20,000 Indefinite $ 212,000 The above goodwill represents future economic benefits expected to be recognized from the company’s expansion into the European wheel market, as well as expected future synergies and operating efficiencies from combining operations with Uniwheels. Acquisition goodwill of $321.7 million (initial balance of $306.2 million, increased for post-acquisition translation adjustments) has been allocated to the European segment. The following unaudited combined pro forma information is for informational purposes only. The pro forma information is not necessarily indicative of what the combined company’s results actually would have been had the Acquisition been completed as of the beginning of the periods as indicated. In addition, the unaudited pro forma information does not purport to project the future results of the combined company. Three Months Ended Nine Months Ended October 1, 2017 September 25, October 1, September 25, Proforma Proforma Proforma Proforma (Dollars in thousands) Net sales as reported $ 331,404 $ 175,580 $ 746,252 $ 544,354 Uniwheels sales, prior to the Acquisition — 124,813 243,744 373,614 Proforma combined sales $ 331,404 $ 300,393 $ 989,996 $ 917,968 Net (loss) income as reported $ 2,615 $ 5,974 $ (1,554 ) $ 33,602 Uniwheels net income before income taxes, prior to the Acquisition — 15,282 25,394 47,749 Incremental interest expense on the debt — (10,630 ) (17,716 ) (31,889 ) Incremental amortization on the identifiable intangible assets — (6,187 ) (10,312 ) (18,562 ) Transaction expenses incurred by both the company and Uniwheels 10,079 — 27,572 — Income tax expense related to the proforma adjustments (3,528 ) 1,653 (6,877 ) 4,528 Proforma net income (loss) $ 9,166 $ 6,092 $ 16,507 $ 35,428

Restructuring

Restructuring	9 Months Ended
	Oct. 01, 2017
Restructuring and Related Activities [Abstract]
Restructuring	Note 4 – Restructuring During 2014, we completed a review of initiatives to reduce costs and enhance our competitive position. Based on this review, we committed to a plan to close operations at our Rogers, Arkansas facility, which was completed during the fourth quarter of 2014. The action was undertaken in order to reduce costs and enhance our global competitive position. During the fourth quarter of 2016, we sold the Rogers facility for total proceeds of $4.3 million, resulting in a $1.4 million gain on sale, which is recorded as a reduction to selling, general and administrative expense in the consolidated income statements. The total cost incurred as a result of the Rogers facility closure was $16.0 million, of which $0.1 million and $0.2 million was recognized for the nine month periods ended October 1, 2017 and September 25, 2016, respectively. The following table summarizes the Rogers, Arkansas plant closure costs and classification in the consolidated income statement for the period ended October 1, 2017: (Dollars in thousands) Costs Incurred Costs Incurred Total Costs Classification Accelerated and other depreciation of assets idled $ 7,254 $ 13 $ 7,267 Cost of sales, Severance costs 2,011 — 2,011 Cost of sales, Equipment removal and impairment, inventory written-down, lease termination and other costs 6,634 117 6,751 Cost of sales, 15,899 130 16,029 Gain on sale of the facility (1,436 ) — (1,436 ) Total $ 14,463 $ 130 $ 14,593

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Oct. 01, 2017
Fair Value Disclosures [Abstract]
Fair Value Measurements	Note 5 – Fair Value Measurements The company applies fair value accounting for all financial assets and liabilities and non-financial Level 1 – Quoted prices in active markets for identical assets or liabilities. Level 2 – Observable inputs other than quoted prices in active markets for identical assets and liabilities, quoted prices for identical or similar assets or liabilities in inactive markets, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 3 – Inputs that are generally unobservable and typically reflect management’s estimate of assumptions that market participants would use in pricing the asset or liability. The carrying amounts for cash and cash equivalents, investments in certificates of deposit, accounts receivable, accounts payable and accrued expenses approximate their fair values due to the short period of time until maturity. Cash and Cash Equivalents Included in cash and cash equivalents are highly liquid investments that are readily convertible to known amounts of cash, and which are subject to an insignificant risk of change in value due to interest rates, quoted price or penalty on withdrawal. A debt security is classified as a cash equivalent if it meets these criteria and if it has a remaining time to maturity of three months or less from the date of acquisition. Amounts on deposit and available upon demand, or negotiated to provide for daily liquidity without penalty, are classified as cash and cash equivalents. Time deposits, certificates of deposit and money market accounts that meet the above criteria are reported at par value on our balance sheet and are excluded from the table below. Derivative Financial Instruments Our derivatives are over-the-counter non-performance Cash Surrender Value The cash surrender value of the life insurance policies is the sum of money the insurance company will pay to the company in the event the policy is voluntarily terminated before its maturity or the insured event occurs. Over the term of the life insurance contracts, the cash surrender value changes as a result of premium payments and investment income offset by investment losses, charges and miscellaneous fees. The amount of the asset recorded for the investment in the life insurance contracts is equal to the cash surrender value which is the amount that will be realized under the contract as of the balance sheet date if the insured event occurs. The following table categorizes items measured at fair value at October 1, 2017: Fair Value Measurement at Reporting Date Using Quoted Prices Significant Other Significant October 1, 2017 Total (Level 1) (Level 2) (Level 3) (Dollars in thousands) Assets Certificates of deposit $ 750 $ — $ 750 $ — Cash surrender value 7,944 — 7,944 — Derivative contracts 8,248 — 8,248 — Total $ 16,942 $ — $ 16,942 $ — Liabilities Derivative contracts $ 7,750 $ — $ 7,750 $ — Embedded derivative liability 6,768 — — 6,768 Total $ 14,518 $ — $ 7,750 $ 6,768 The following table categorizes items measured at fair value at December 31, 2016: Fair Value Measurement at Reporting Date Using December 31, 2016 Total Quoted Prices Significant Other (Level 2) Significant (Level 3) (Dollars in thousands) Assets Certificates of deposit $ 750 $ — $ 750 $ — Cash surrender value 7,480 — 7,480 — Derivative contracts 13 — 13 — Total $ 8,243 $ — $ 8,243 $ — Liabilities Derivative contracts $ 24,773 $ — $ 24,773 $ — Total $ 24,773 $ — $ 24,773 $ —

Financial Instruments

Financial Instruments	9 Months Ended
	Oct. 01, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Financial Instruments	Note 6 – Financial Instruments Debt Instruments The carrying values of the company’s debt instruments vary from their fair values. The fair values were determined by reference to transacted prices of these securities (Level 2 input based on the GAAP fair value hierarchy). The estimated fair value, as well as the carrying value, of the company’s debt instruments are shown below (in thousands): October 1, 2017 (Dollars in thousands) Estimated aggregate fair value $ 688,174 Aggregate carrying value (1) 705,096 (1) Long-term debt excluding the impact of unamortized debt issuance costs. Derivative Instruments and Hedging Activities We use derivatives to partially offset our business exposure to foreign currency risk. We may enter into forward contracts, option contracts, swaps, collars or other derivative instruments to offset some of the risk on expected future cash flows and on certain existing assets and liabilities. However, we may choose not to hedge certain exposures for a variety of reasons including, but not limited to, accounting considerations and the prohibitive economic cost of hedging particular exposures. There can be no assurance the hedges will offset more than a portion of the financial impact resulting from movements in foreign currency exchange rates. To help protect gross margins from fluctuations in foreign currency exchange rates, certain of our subsidiaries whose functional currency is the U.S. dollar hedge a portion of forecasted foreign currency costs. Generally, we may hedge portions of our forecasted foreign currency exposure associated with costs, typically for up to 48 months. We record all derivatives in the condensed consolidated balance sheets at fair value. Our accounting treatment for these instruments is based on the hedge designation. The effective portions of cash flow hedges are recorded in Accumulated Other Comprehensive Income (“AOCI”) until the hedged item is recognized in earnings. The ineffective portions of cash flow hedges are recorded in cost of sales. Derivatives that are not designated as hedging instruments are adjusted to fair value through earnings in the financial statement line item to which the derivative relates. All derivatives were designated as hedging instruments at December 31, 2016. At October 1, 2017, the company held derivatives that were designated as hedging instruments as well as derivatives that did not qualify for designation as hedging instruments as discussed below. Deferred gains and losses associated with cash flow hedges of foreign currency costs are recognized as a component of cost of sales in the same period as the related cost is recognized. Our foreign currency transactions hedged with cash flow hedges as of October 1, 2017, are expected to occur within 1 month to 48 months. Derivative instruments designated as cash flow hedges must be de-designated two-month re-designated Currency option derivative contracts not designated as hedging instruments consist principally of certain option contracts to purchase Polish Zloty and the Euro related to the acquisition of Uniwheels and a cross currency swap. See Note 3, “Acquisition.” Redeemable Preferred Stock Embedded Derivative We have determined that the conversion option embedded in Series A redeemable preferred stock is required to be accounted for separately from the Series A redeemable preferred stock as a derivative liability. Separation of the conversion option as a derivative liability is required because its economic characteristics are considered more akin to an equity instrument and therefore the conversion option is not considered to be clearly and closely related to the economic characteristics of the redeemable preferred stock. This is because the economic characteristics of the redeemable preferred stock are considered more akin to a debt instrument due to the fact that the shares are redeemable at the holder’s option, the redemption value is significantly greater than the face amount, the shares carry a fixed mandatory dividend, the stock price necessary to make conversion more attractive than redemption ($56.324) is significantly greater than the price at the date of issuance ($19.05), all of which lead to the conclusion that redemption is more likely than conversion. For additional information on the redeemable preferred stock, see Note 13, “Redeemable Preferred Shares” in Notes to Condensed Consolidated Financial Statements. We have also determined that the early redemption option upon the occurrence of a redemption event (e.g. change of control, etc.) must also be bifurcated and accounted for separately from the redeemable preferred stock at fair value, because the debt host contract involves a substantial discount (face of $150.0 million as compared to the redemption value of $300 million) and exercise of the early redemption option would accelerate the holder’s option to redeem the shares. Accordingly, we have recorded an embedded derivative liability representing the combined fair value of the right of holders to receive common stock upon conversion of Series A redeemable preferred stock at any time (the “conversion option”) and the right of the holders to exercise their early redemption option upon the occurrence of a redemption event (the “early redemption option”). The embedded derivative liability is adjusted to reflect fair value at each period end with changes in fair value recorded in the “Change in fair value of redeemable preferred stock embedded derivative liability” financial statement line item of the company’s consolidated statements of operations (refer to “Note 13, Redeemable Preferred Shares”). A binomial option pricing model is used to estimate the fair value of the conversion and early redemption options embedded in the redeemable preferred stock. The binomial model utilizes a “decision tree” whereby future movement in the company’s common stock price is estimated based on the volatility factor. The binomial options pricing model requires the development and use of assumptions. These assumptions include estimated volatility of the value of our common stock, assumed possible conversion or early redemption dates, an appropriate risk-free interest rate, risky bond rate and dividend yield. The expected volatility of the company’s equity is estimated based on the historical volatility of our common stock. The assumed base case term used in the valuation model is the period remaining until May 22, 2024 (the earliest date at which the holder may exercise its unconditional redemption option). A number of other scenarios incorporated earlier redemption dates to address the possibility of early redemption upon the occurrence of a redemption event. The risk-free interest rate is based on the yield on the U.S. Treasury zero coupon yield curve with a remaining term equal to the expected term of the conversion and early redemption options. The significant assumptions utilized in the company’s valuation of the embedded derivatives at October 1, 2017 are as follows: valuation scenario terms between 4.25 and 6.64 years, volatility of 32.0%, risk-free rate of 1.81%-2.12% Based on the foregoing assumptions the fair value of the redeemable preferred stock embedded derivative liability at October 1, 2017 is $6.7 million and the change in fair value of redeemable preferred stock embedded derivative liability during the quarter was $4.1 million mainly due to the decline in our stock price from $19.05 (at date of issuance) to $16.65 (at October 1, 2017) and the reduction in the remaining term of the options used in the valuation scenarios due to the months elapsed since issuance. The following tables display the fair value of derivatives by balance sheet line item at October 1, 2017 and December 31, 2016: October 1, 2017 Other Current Other Non-current Accrued Other Non-current (Dollars in thousands) Foreign exchange forward contracts and collars designated as hedging instruments $ 2,856 $ 4,410 $ 3,053 $ 2,700 Aluminum forward contracts not designated as hedges 982 — 35 — Cross currency swap not designated as hedging instrument — — 654 1,308 Embedded derivative liability — — — 6,768 Total derivative financial instruments $ 3,838 $ 4,410 $ 3,742 $ 10,776 December 31, 2016 Other Current Other Non-current Accrued Other Non-current (Dollars in thousands) Foreign exchange forward contracts and collars designated as hedging instruments $ 13 $ — $ 10,076 $ 14,697 Total derivative financial instruments $ 13 $ — $ 10,076 $ 14,697 The following table summarizes the notional amount and estimated fair value of our derivative financial instruments: October 1, 2017 December 31, 2016 Notional Fair Value Notional Fair Value (Dollars in thousands) Foreign currency forward contracts and collars designated as hedging instruments $ 287,255 $ 1,513 $ 160,461 $ (24,760 ) Aluminum forward contracts not designated as hedges 13,588 947 — — Cross currency swap not designated as hedging instrument 36,453 (1,962 ) — — Total derivative financial instruments $ 337,296 $ 498 $ 160,461 $ (24,760 ) Notional amounts are presented on a gross basis. The notional amounts of the derivative financial instruments do not represent amounts exchanged by the parties and, therefore, are not a direct measure of our exposure to the financial risks described above. The amounts exchanged are calculated by reference to the notional amounts and by other terms of the derivatives, such as interest rates, foreign currency exchange rates or commodity volumes and prices. The following table provides the impact of derivative instruments designated as cash flow hedges on our statement of operations: Nine Months ended October 1, 2017 Amount of Gain or (Loss) Amount of Pre-tax Amount of Pre-tax Gain or (Dollars in thousands) Foreign currency forward contracts and collars $ 25,438 $ (3,630 ) $ 59 Total $ 25,438 $ (3,630 ) $ 59 Nine Months ended September 25, Amount of Gain or (Loss) Amount of Pre-tax Amount of Pre-tax Gain or (Dollars in thousands) Foreign currency forward contracts and collars $ 8,227 $ 9,777 $ 133 Total $ 8,227 $ 9,777 $ 133

Business Segments

Business Segments	9 Months Ended
	Oct. 01, 2017
Segment Reporting [Abstract]
Business Segments	Note 7 – Business Segments Superior groups its operating segments into reportable segments in which sales and manufacturing efforts are focused. The products, manufacturing, and procurement are similar throughout the company’s operations. Each operating segment has discrete financial information evaluated regularly by the company’s Chief Operating Decision Maker (“CODM”) in determining resource allocation and assessing performance. As a result of the Uniwheels acquisition, the company realigned its executive management structure which changed the information used by our CODM to assess performance and allocate resources. Due to different economic circumstances and customer base in the company’s operations and in conformity with ASC Topic 280, “Segment Reporting,” the company reports the results of its business in two reportable segments: North America and Europe. Net Sales and Results of Operations by Reportable Segment Three Months Ended Nine Months Ended October 1, 2017 September 25, 2016 October 1, 2017 September 25, 2016 (Dollars in thousands) Net sales: North America $ 180,100 $ 175,580 $ 541,218 $ 544,354 Europe 151,304 — 205,034 — Consolidated net sales $ 331,404 $ 175,580 $ 746,252 $ 544,354 Income from operations: North America $ 1,413 $ 5,250 $ 4,260 $ 43,512 Europe 4,345 — 3,444 — Consolidated income from operations $ 5,758 $ 5,250 $ 7,704 $ 43,512 Total Assets by Reportable Segment October 1, 2017 December 31, 2016 (Dollars in thousands) North America $ 554,408 $ 542,756 Europe 1,008,947 — Total assets $ 1,563,355 $ 542,756

Short-Term Investments

Short-Term Investments	9 Months Ended
	Oct. 01, 2017
Cash and Cash Equivalents [Abstract]
Short-Term Investments	Note 8 – Short-Term 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 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 each of October 1, 2017 and December 31, 2016, certificates of deposit totaling $0.8 million were restricted in use and were classified as short-term investments on our condensed consolidated balance sheets.

Inventories

Inventories	9 Months Ended
	Oct. 01, 2017
Inventory Disclosure [Abstract]
Inventories	Note 9 – Inventories October 1, 2017 December 31, 2016 (Dollars in thousands) Raw materials $ 59,744 $ 40,255 Work in process 53,711 21,447 Finished goods 64,642 21,135 Inventories $ 178,097 $ 82,837 Service wheel and supplies inventory included in other non-current

Property, Plant and Equipment

Property, Plant and Equipment	9 Months Ended
	Oct. 01, 2017
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	Note 10 – Property, Plant and Equipment October 1, 2017 December 31, 2016 (Dollars in thousands) Land and buildings $ 138,570 $ 67,915 Machinery and equipment 699,817 485,185 Leasehold improvements and others 11,141 4,868 Construction in progress 53,686 26,301 903,214 584,269 Accumulated depreciation (384,956 ) (356,866 ) Property, plant and equipment, net $ 518,258 $ 227,403 Depreciation expense was $36.7 million and $25.9 million for the nine months ended October 1, 2017 and September 25, 2016, respectively. The significant increase in balances is attributable to property, plant, and equipment related to our acquired European operations.

Preproduction Costs Related to

Preproduction Costs Related to Long-Term Supply Arrangements	9 Months Ended
	Oct. 01, 2017
Accounting Policies [Abstract]
Preproduction Costs Related to Long-Term Supply Arrangements	Note 11 – Preproduction Costs 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 customers 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 $5.7 million and $6.2 million for the nine months ended October 1, 2017 and September 25, 2016, respectively, are included in net sales in the condensed consolidated statements of operations. The following tables summarize the unamortized customer-owned tooling costs included in our non-current non-current October 1, 2017 December 31, 2016 (Dollars in thousands) Customer-Owned Tooling Costs Preproduction costs $ 82,751 $ 78,299 Accumulated amortization (69,954 ) (65,100 ) Net preproduction costs $ 12,797 $ 13,199 Deferred Tooling Revenues Accrued expenses $ 5,436 $ 5,419 Other non-current 2,439 2,593 Total deferred tooling revenues $ 7,875 $ 8,012

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	9 Months Ended
	Oct. 01, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Note 12 – Goodwill and Other Intangible Assets Goodwill and indefinite-lived assets, such as certain trade names acquired in connection with the acquisition of Uniwheels on May 30, 2017, are not amortized, but are instead evaluated for impairment on an annual basis at the end of the fiscal year, or more frequently if events or circumstances indicate that impairment may be more likely. During the three months ended October 1, 2017, no impairment charges have been taken against the company’s goodwill or indefinite-lived intangible assets. At October 1, 2017, the goodwill is $321.7 million, consisting of the initial balance of $306.2 million, increased for post-acquisition translation adjustments. The carrying amount of goodwill arose from the Acquisition described in Note 3, “Acquisition”. The company’s other intangible assets primarily consist of assets with finite lives. These assets are amortized on a straight-line basis over their estimated useful lives. Following is a summary of the company’s finite-lived and indefinite-lived intangible assets as of October 1, 2017. There were no such intangible assets at December 31, 2016. Gross Accumulated Currency Net Remaining (Dollars in thousands Brand name $ 9,000 $ (516 ) $ 447 $ 8,931 5-6 Technology 16,000 (1,102 ) 792 15,690 4-6 Customer relationships 167,000 (7,446 ) 8,335 167,889 6-11 Total finite 192,000 (9,064 ) 9,574 192,510 Trade names 20,000 — 1,014 21,014 Indefinite Total $ 212,000 $ (9,064 ) $ 10,588 $ 213,524 Amortization expense for these intangible assets was $6.9 million for the three month period ended October 1, 2017. The anticipated annual amortization expense for these intangible assets is $27.2 million for 2018 to 2021 and $25.3 million for 2022.

Redeemable Preferred Shares

Redeemable Preferred Shares	9 Months Ended
	Oct. 01, 2017
Temporary Equity Disclosure [Abstract]
Redeemable Preferred Shares	Note 13 – Redeemable Preferred Shares On March 22, 2017, Superior and TPG Growth III Sidewall, L.P. (“TPG”) entered into an Investment Agreement pursuant to which Superior agreed to issue a number of shares of Series A Perpetual Convertible Preferred Stock (the “Series A redeemable preferred stock”) and Series B Perpetual Preferred Stock (the “Series B redeemable preferred stock”), par value $0.01 per share (the “Series A redeemable preferred stock” and “Series B redeemable preferred stock” referred to collectively as the “redeemable preferred stock”) to TPG for an aggregate purchase price of $150.0 million (the “Investment”). As of the closing of the Investment on May 22, 2017, Superior issued 140,202 shares of Series A redeemable preferred stock, which was equal to 19.99 percent of Superior’s common stock outstanding on such date, and 9,798 shares of Series B redeemable preferred stock to TPG. On August 30, 2017, our stockholders approved the conversion of 9,798 shares of Series B redeemable preferred stock into Series A redeemable preferred stock and all outstanding shares of Series B redeemable preferred stock were automatically converted into Series A redeemable preferred stock (the “Conversion”). Series A redeemable preferred stock has an initial stated value of $1,000 per share, par value of $0.01 per share and liquidation preference over common stock. Series A redeemable preferred stock is convertible into shares of Superior common stock equal to the number of shares determined by dividing the sum of the stated value and any accrued and unpaid dividends by the conversion price of $28.162. Series A redeemable preferred stock accrues dividends at a rate of 9 percent per annum, payable at Superior’s election either in-kind We may mandate conversion of the Series A redeemable preferred stock if the price of the common stock exceeds $84.49. TPG may redeem the shares upon the occurrence of any of the following events (referred to as a “redemption event”): a change in control, recapitalization, merger, sale of substantially all of the company’s assets, liquidation or delisting of the company’s common stock. In addition, TPG may, at its option, unconditionally redeem the shares at any time after May 23, 2024. Superior may, at its option, redeem in whole at any time all of the shares of Series A redeemable preferred stock outstanding. If redeemed by either party on or before October 22, 2018, the redemption value (the “redemption value”) would be $262.5 million (1.75 times stated value). If redeemed after October 22, 2018, the redemption value would be the greater of $300 million (2.0 times stated value) or the product of the number of common shares into which the Series A redeemable preferred stock could be converted (5.3 million shares currently) and the then current market price of the common stock. We have determined that the conversion option embedded in the redeemable preferred stock is required to be accounted for separately from the redeemable preferred stock as a derivative liability. Separation of the conversion option as a derivative liability is required because its economic characteristics are considered more akin to an equity instrument and therefore the conversion option is not considered to be clearly and closely related to the economic characteristics of the redeemable preferred stock. This is because the economic characteristics of the redeemable preferred stock are considered more akin to a debt instrument due to the fact that the shares are redeemable at the holder’s option, the redemption value is significantly greater than the face amount, the shares carry a fixed mandatory dividend, the stock price necessary to make conversion more attractive than redemption ($56.324) is significantly greater than the price at the date of issuance ($19.05), all of which lead to the conclusion that redemption is more likely than conversion. We have also determined that the early redemption option exercisable upon the occurrence of a redemption event must also be bifurcated and accounted for separately from the redeemable preferred stock at fair value, because the debt host contract involves a substantial discount (face of $150 million as compared to the redemption value of $300 million) and the exercise of the early redemption option upon the occurrence of a redemption event would accelerate the holder’s option to redeem the shares. Accordingly, we have recorded an embedded derivative liability representing the estimated combined fair value of the right of holders to receive common stock upon conversion (the “conversion option”) and the right of the holders to exercise their early redemption option upon the occurrence of a redemption event (the “early redemption option”). The embedded derivative liability is adjusted to reflect fair value at each period end with changes in fair value recorded in the “Change in fair value of redeemable preferred stock embedded derivative liability” financial statement line item of the company’s condensed consolidated statements of operations. Refer to “Note 6, Financial Instruments” for further information regarding the valuation of the embedded derivative. Since the redeemable preferred stock may be redeemed at the option of the holder, but is not mandatorily redeemable, the redeemable preferred stock has been classified as mezzanine equity and initially recognized at fair value of $150 million (the proceeds on the date of issuance) less issuance costs of $3.7 million, resulting in an initial value of $146.3 million. This amount has been further reduced by $10.9 million assigned to the embedded derivative liability at date of issuance, resulting in an adjusted initial value of $135.4 million. We are accreting the difference between the adjusted initial value of $135.4 million and the redemption value of $300 million over the seven-year period from date of issuance through May 23, 2024 (the date at which the holder has the unconditional right to redeem the shares, deemed to be the earliest likely redemption date) using the effective interest method. The accretion to the carrying value of the redeemable preferred stock is treated as a deemed dividend, recorded as a charge to retained earnings and deducted in computing earnings per share (analogous to the treatment for stated and participating dividends paid on the redeemable preferred shares). We have accreted $5.2 million through October 1, 2017 resulting in a balance of $140.6 million.

Earnings Per Share

Earnings Per Share	9 Months Ended
	Oct. 01, 2017
Earnings Per Share [Abstract]
Earnings Per Share	Note 14 – Earnings Per Share In accordance with U.S. GAAP, basic earnings per share is computed by dividing net income (loss), less preferred dividends, by the weighted average number of common shares outstanding. 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 of our redeemable preferred stock, outstanding stock options and time and performance based restricted stock units under the treasury stock method, which includes consideration of stock-based compensation required by U.S. GAAP. (Dollars and shares in thousands, except per share amounts) Three Months Ended Nine Months Ended October 1, September 25, October 1, September 25, Basic Income Per Share: Reported net income (loss) $ 2,615 $ 5,974 $ (1,554 ) $ 33,602 Less: Redeemable preferred stock dividends (8,147 ) — (11,029 ) — Basic numerator $ (5,532 ) $ 5,974 $ (12,583 ) $ 33,602 Basic (loss) income per share $ (0.22 ) $ 0.24 $ (0.50 ) $ 1.32 Weighted average shares outstanding-Basic 24,905 25,424 24,941 25,482 Diluted Income Per Share: Reported net income (loss) $ 2,615 $ 5,974 $ (1,554 ) $ 33,602 Less: Redeemable preferred stock dividends (8,147 ) — (11,029 ) — Diluted numerator $ (5,532 ) $ 5,974 $ (12,583 ) $ 33,602 Diluted (loss) income per share $ (0.22 ) $ 0.23 $ (0.50 ) $ 1.31 Weighted average shares outstanding-Basic 24,905 25,424 24,941 25,482 Weighted average dilutive stock options and restricted stock units — 146 — 97 Weighted average shares outstanding-Diluted 24,905 25,570 24,941 25,579 For the first nine months of 2017, no options were included in the diluted earnings per share calculation because to do so would have been anti-dilutive. The performance shares discussed in Note 19, “Stock-Based Compensation” are not included in the diluted earnings per share because the performance metrics had not been met as of the period ended October 1, 2017. The redeemable preferred shares discussed in Note 13, “Redeemable Preferred Shares” are not included in the diluted earnings per share because the conversion would be anti-dilutive as of the period ended October 1, 2017.

Income Taxes

Income Taxes	9 Months Ended
	Oct. 01, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Note 15 – Income Taxes The estimated annual effective tax rate is forecasted quarterly using actual historical information and forward-looking estimates and applied to year-to-date The income tax benefit for the nine months ended October 1, 2017, was $4.9 million on a pre-tax pre-tax

Retirement Plans

Retirement Plans	9 Months Ended
	Oct. 01, 2017
Retirement Benefits [Abstract]
Retirement Plans	Note 16 – Retirement Plans We have an unfunded salary continuation plan covering certain directors, officers and other key members of management. We purchase life insurance policies on certain participants to provide, in part, for future liabilities. Cash surrender value of these policies, totaling $7.9 million and $7.5 million at October 1, 2017 and December 31, 2016, respectively, are included in other non-current For the nine months ended October 1, 2017, payments to retirees or their beneficiaries totaled approximately $1.1 million. We presently anticipate benefit payments in 2017 to total approximately $1.5 million. The following table summarizes the components of net periodic pension cost for the first nine months of 2017 and 2016. Three Months Ended Nine Months Ended October 1, September 25, October 1, September 25, (Dollars in thousands) Service cost $ — $ — $ — $ — Interest cost 298 304 894 912 Net amortization 67 84 201 252 Net periodic pension cost $ 365 $ 388 $ 1,095 $ 1,164

Debt

Debt	9 Months Ended
	Oct. 01, 2017
Debt Disclosure [Abstract]
Debt	Note 17 – Debt A summary of long-term debt and the related weighted average interest rates is shown below (in thousands): October 1, 2017 Debt Instrument Long-Term Debt (1) Long-Term Weighted Term loan facility $ 387,800 $ (12,957 ) $ 374,843 5.5 % 6.00% Senior Notes due 2025 294,166 (7,919 ) 286,247 6.0 % Other 23,130 (3,316 ) 19,814 1.0 % $ 705,096 $ (24,192 ) 680,904 Less: Current portion (5,800 ) Long-term debt $ 675,104 (1) Senior Notes On June 15, 2017, Superior issued €250.0 million aggregate principal amount of 6.0% Senior Notes (the “Notes”) due June 15, 2025. Interest on the Notes is payable semiannually, June 15 and December 25. Superior may redeem the Notes, in whole or in part, on or after June 15, 2020 at redemption prices of 103.000% and 101.500% of the principal amount thereof if the redemption occurs during the 12-month The Notes are senior unsecured obligations ranking equally in right of payment with all of its existing and future senior indebtedness and senior in right of payment to any subordinated indebtedness. The notes are effectively subordinated in right of payment to the existing and future secured indebtedness of the Issuer, including the Senior Secured Credit Facilities (as defined below), to the extent of the assets securing such indebtedness. Guarantee The Notes are unconditionally guaranteed by all material wholly-owned direct and indirect domestic restricted subsidiaries of the company (the “Subsidiary Guarantors”), with customary exceptions including, among other things, where providing such guarantees is not permitted by law, regulation or contract or would result in adverse tax consequences. Covenants Subject to certain exceptions, the indenture governing the Notes contains restrictive covenants that, among other things, limit the ability of Superior and the Subsidiary Guarantors to: (i) incur additional indebtedness or issue certain preferred stock; (ii) pay dividends on, or make distributions in respect of, their capital stock; (iii) make certain investments or other restricted payments; (iv) sell certain assets or issue capital stock of restricted subsidiaries; (v) create liens; (vi) merge, consolidate, transfer or dispose of substantially all of their assets; and (vii) engage in certain transactions with affiliates. These covenants are subject to a number of important limitations and exceptions that are described in the indenture. The indenture provides for customary events of default that include, among other things (subject in certain cases to customary grace and cure periods): (i) nonpayment of principal, premium, if any, and interest, when due; (ii) breach of covenants in the indenture; (iii) a failure to pay certain judgments; and (iv) certain events of bankruptcy and insolvency. If an event of default occurs and is continuing, the Trustee or holders of at least 30% in principal amount of the then outstanding Notes may declare the principal, premium, if any, and accrued and unpaid interest on all the Notes to be due and payable. These events of default are subject to a number of important qualifications, limitations and exceptions that are described in the indenture. As of October 1, 2017, the company was in compliance with all covenants under the indentures governing the Notes. Senior Secured Credit Facilities On March 22, 2017, Superior entered into a senior secured credit agreement (the “Credit Agreement”) with Citibank, N.A, JP Morgan Chase N.A., Royal Bank of Canada and Deutsche Bank A.G. New York Branch (collectively, the “Lenders”). The Credit Agreement consisted of a $400.0 million senior secured term loan facility (the “Term Loan Facility”) and a $160.0 million revolving credit facility (the “Revolving Credit Facility” and, together with the Term Loan Facility, the “Senior Secured Credit Facilities”). Borrowings under the Term Loan Facility will bear interest at a rate equal to, at the company’s option, either (a) LIBOR for the relevant interest period, adjusted for statutory reserve requirements, subject to a floor of 1.00 percent per annum, plus an applicable rate of 4.50 percent or (b) a base rate, subject to a floor of 2.00 percent per annum, equal to the highest of (1) the rate of interest in effect as publicly announced by the administrative agent as its prime rate, (2) the federal funds rate plus 0.50 percent and (3) LIBOR for an interest period of one month plus 1.00 percent, in each case, plus an applicable rate of 3.50 percent. Borrowings under the Revolving Credit Facility initially bear interest at a rate equal to, at the company’s option, either (a) LIBOR for the relevant interest period, adjusted for statutory reserve requirements, subject to a floor of 1.00 percent per annum, plus an applicable rate of 3.50 percent or (b) a base rate, subject to a floor of 2.00 percent per annum, equal to the highest of (1) the rate of interest in effect as publicly announced by the administrative agent as its prime rate, (2) the federal funds effective rate plus 0.50 percent and (3) LIBOR for an interest period of one month plus 1.00 percent, in each case, plus an applicable rate of 3.50 percent provided such rate may not be less than zero. The initial commitment fee for unused commitments under the Revolving Credit Facility shall be 0.50 percent. After September 30, 2017, the applicable rates for borrowings under the Revolving Credit Facility and commitment fees for unused commitments under the Revolving Credit Facility are based upon the First Lien Net Leverage Ratio effective for the preceding quarter with LIBOR applicable rates between 3.50 percent and 3.00 percent, base rate applicable rates between 2.50 percent and 2.00 percent and commitment fees between 0.50 percent and 0.25 percent. Commitment fees are included in our condensed consolidated financial statements line, interest (expense) income, net. As of October 1, 2017, the company repaid an additional $1.0 million under the term loan facility resulting in a balance of $387.8 million. As of October 1, 2017, the company had no outstanding borrowings under the Revolving Credit Facility, had outstanding letters of credit of $2.8 million and available unused commitments under the facility of $157.2 million. Guarantees Our obligations under the Credit Agreement are unconditionally guaranteed by all material wholly-owned direct and indirect domestic restricted subsidiaries of the company, with customary exceptions including, among other things, where providing such guarantees is not permitted by law, regulation or contract or would result in adverse tax consequences. The guarantees of such obligations, will be secured, subject to permitted liens and other exceptions, by substantially all of our assets and the Subsidiary Guarantors’ assets, including but not limited to: (i) a perfected pledge of all of the capital stock issued by each of the company’s direct wholly-owned domestic restricted subsidiaries or any guarantor (subject to certain exceptions) and up to 65 percent of the capital stock issued by each direct wholly-owned foreign restricted subsidiary of the company or any guarantor (subject to certain exceptions) and (ii) perfected security interests in and mortgages on substantially all tangible and intangible personal property and material fee-owned Covenants The Senior Secured Credit Facilities contain a number of covenants that, among other things, restrict, subject to certain exceptions, our ability to incur additional indebtedness and guarantee indebtedness, create or incur liens, engage in mergers or consolidations, sell, transfer or otherwise dispose of assets, make investments, acquisitions, loans or advances, pay dividends, distributions or other restricted payments, or repurchase our capital stock, prepay, redeem, or repurchase any subordinated indebtedness, enter into agreements which limit our ability to incur liens on our assets or that restrict the ability of restricted subsidiaries to pay dividends or make other restricted payments to us, and enter into certain transactions with our affiliates. In addition, the Credit Agreement contains customary default provisions, representations and warranties and restrictive covenants. The Credit Agreement also contains a provision permitting the Lenders to accelerate the repayment of all loans outstanding under the Senior Secured Credit Facilities during an event of default. As of October 1, 2017, the company was in compliance with all covenants under the Credit Agreement. Uniwheels Debt In connection with the acquisition of Uniwheels, the company assumed $70.7 million of outstanding debt. At October 1, 2017, $23.1 million of debt remained outstanding, including an equipment loan of $21.3 million and an outstanding balance of $1.8 million under a Euro 30.0 million revolving line of credit which expires July 31, 2020. At October 1, 2017, $5.8 million of this debt was classified as current. The revolving credit facility bears interest at Euribor plus 1.0 percent (but in any event not less than 0.96 percent) and the equipment loan bears interest at 1.00 percent.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Oct. 01, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 18 – Commitments and Contingencies Derivatives and Purchase Commitments 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 commodities. In accordance with our corporate risk management policies, we may enter into foreign currency forward and option contracts with financial institutions to protect against foreign exchange risks associated with certain existing assets and liabilities, certain firmly committed transactions and forecasted future cash flows. We have implemented a program to hedge a portion of our material foreign exchange exposures for up to approximately 48 months. For additional information on our derivatives, see Note 6, “Financial Instruments”. When market conditions warrant, we may also enter into purchase commitments to secure the supply of certain commodities used in the manufacture of our products, such as aluminum, natural gas and other raw materials. At October 1, 2017, we did not have any purchase commitments in place for the delivery of aluminum, natural gas or other raw materials in 2017. Other We are party to various legal and environmental proceedings incidental to our business. Certain claims, suits and complaints arising in the ordinary course of business have been filed or are pending against us. Based on facts now known, we believe all such matters are adequately provided for, covered by insurance, are without merit and/or involve such amounts that would not materially adversely affect our consolidated results of operations, cash flows or financial position.

Stock-Based Compensation

Stock-Based Compensation	9 Months Ended
	Oct. 01, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	Note 19 – Stock-Based Compensation 2008 Equity Incentive Plan Our 2008 Equity Incentive Plan, as amended (the “Plan”), authorizes us to issue up to 3.5 million shares of common stock, along with non-qualified non-employee During the first quarter of 2015, the company implemented a long term incentive program for the benefit of certain members of company management. The program was designed to strengthen employee retention and to provide a more structured incentive program to stimulate improvement in future company results. Per the terms of the program, participants were granted, in 2015 to 2017, time value restricted stock units (“RSUs”), vesting ratably over a three year time period, and performance restricted stock units (“PSUs”), with a three year cliff vesting. Upon vesting, each restricted stock award is exchangeable for one share of the company’s common stock, with accrued dividends. The PSUs are categorized further into three individual categories whose vesting is contingent upon the achievement of certain targets as follows: • 40% of the PSUs vest upon certain Return on Invested Capital targets for 2015 to 2017 units • 40% of the PSUs vest upon certain Cumulative EPS targets for 2016 to 2017 units • 40% of the PSUs vest upon certain EBITDA margin targets for 2015 units • 20% of the PSUs vest upon certain market based Shareholder Return targets for 2015 to 2017 units. Options Options are granted at not less than fair market value on the date of grant and expire no later than ten years after the date of grant. Options and restricted shares granted under the Plan generally require no less than a three year ratable vesting period. Stock option activity in the first nine months of 2017 is summarized in the following table: Outstanding Weighted Average Exercise Price Remaining Contractual Life in Years Aggregate Intrinsic Value Balance at December 31, 2016 231,625 $ 18.88 3.1 $ 1,845,263 Granted — $ — Exercised (2,000 ) $ 16.76 Canceled (6,000 ) $ 21.09 Expired — $ — Balance at October 1, 2017 223,625 $ 18.84 Options vested or expected to vest at October 1, 2017 223,625 $ 18.84 1.6 $ 51,478 Exercisable at October 1, 2017 223,625 $ 18.84 1.6 $ 51,478 Restricted Stock Awards Restricted stock awards, or “full value” awards, generally vest ratably over no less than a three year period. Shares of restricted stock granted under the Plan are considered issued and outstanding at the date of grant, have the same dividend and voting rights as other outstanding common stock, are subject to forfeiture if employment terminates prior to vesting and are expensed ratably over the vesting period. Dividends paid on the restricted shares granted under the Plan are non-forfeitable Number Weighted Average Weighted Average Balance at December 31, 2016 144,295 $ 19.43 0.5 Granted — $ — Vested (137,823 ) $ 19.43 Canceled (3,667 ) $ 19.16 Balance at October 1, 2017 2,805 $ 19.72 0.2 Restricted Stock Units Restricted stock unit activity in the first nine months of 2017 is summarized in the following table: Number of Weighted Average Weighted Average Balance at December 31, 2016 127,567 $ 22.03 1.7 Granted 131,656 $ 22.24 Vested (37,844 ) $ 23.72 Canceled (22,068 ) $ 22.95 Balance at October 1, 2017 199,311 $ 21.74 1.7 Restricted Performance Stock Units Restricted performance stock unit activity in the first nine months of 2017 is summarized in the following table: Number of Weighted Average Weighted Average Balance at December 31, 2016 227,193 $ 21.72 1.6 Granted 164,566 $ 22.39 Vested — $ — Canceled (63,166 ) $ 22.47 Balance at October 1, 2017 328,593 $ 21.92 1.9 Stock-Based Compensation Stock-based compensation expense related to our equity incentive plans in accordance with U.S. GAAP was allocated as follows: Three Months Ended Nine Months Ended October 1, September 25, October 1, September 25, (Dollars in thousands) Cost of sales $ 85 $ 6 $ 134 $ 364 Selling, general and administrative expenses (100 ) 338 838 2,294 Stock-based compensation expense before income taxes (15 ) 344 972 2,658 Income tax benefit 6 (123 ) (358 ) (771 ) Total stock-based compensation expense after income taxes $ (9 ) $ 221 $ 614 $ 1,887 As of October 1, 2017, a total of $3.5 million of unrecognized compensation cost related to non-vested

Common Stock Repurchase Program

Common Stock Repurchase Programs	9 Months Ended
	Oct. 01, 2017
Text Block [Abstract]
Common Stock Repurchase Programs	Note 20 – Common Stock Repurchase Programs In October 2014, our Board of Directors approved a stock repurchase program (the “2014 Repurchase Program”) which authorized the repurchase of up to $30.0 million of our common stock. Under the 2014 Repurchase Program, we repurchased common stock from time to time on the open market or in private transactions. Shares repurchased under the 2014 Repurchase Program during 2015 totaled 1,056,954 shares at a cost of $19.6 million. The 2014 Repurchase Program was completed in the beginning of 2016, with purchases of 585,970 shares for a cost of $10.3 million. The repurchased shares described above were either canceled and retired or added to treasury stock after the reincorporation in Delaware in 2015. In January 2016, our Board of Directors approved a new stock repurchase program (the “2016 Repurchase Program”), authorizing the repurchase of up to $50.0 million of common stock. Under the 2016 Repurchase Program, we may repurchase common stock from time to time on the open market or in private transactions. The timing and extent of the repurchases under the 2016 Repurchase Program will depend upon market conditions and other corporate considerations in our sole discretion. During 2016, we repurchased 454,718 shares of company stock at a cost of $10.4 million under the 2016 Repurchase Program. In the first nine months of 2017, we repurchased an additional 215,841 shares of company stock at a cost of $5.0 million under the 2016 Repurchase Program. Superior does not anticipate any repurchases under the 2016 Repurchase Program in the near term.

Subsequent Event

Subsequent Event	9 Months Ended
	Oct. 01, 2017
Subsequent Events [Abstract]
Subsequent Event	Note 21 - Subsequent Event As of October 20, 2017, a Domination and Profit Loss Transfer Agreement (“DPLTA”) between Superior Industries International Germany AG (“Superior AG”) and Uniwheels AG was proposed and will be submitted for approval to the Uniwheels shareholders on December 4 th merger/squeeze-out. merger/squeeze-out. According s

Presentation of Condensed Con29

Presentation of Condensed Consolidated Financial Statements (Policies)	9 Months Ended
	Oct. 01, 2017
Accounting Policies [Abstract]
Basis of Accounting	During interim periods, we follow the accounting policies set forth in our Annual Report on Form 10-K 10-K”) 10-Q 10-K. In the past, Superior has used a 4-4-5 quarter-end The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with the SEC’s requirements for quarterly reports on Form 10-Q
Use of Estimates	Interim financial reporting standards require us to make estimates that are based on assumptions regarding the outcome of future events and circumstances not known at that time, including the use of estimated effective tax rates. Inevitably, some assumptions will not materialize, unanticipated events or circumstances may occur which vary from those estimates and such variations may significantly affect our future results. Additionally, interim results may not be indicative of our results for future interim periods or our annual results.
New Accounting Pronouncements	New Accounting Pronouncements In May 2014, the FASB issued Accounting Standards Update (“ASU”) “Revenue from Contracts with Customers.” This update outlines a single, comprehensive model for accounting for revenue from contracts with customers. We plan to adopt this update on January 1, 2018. The guidance permits two methods of adoption: retrospectively to each prior reporting period presented (full retrospective method), or retrospectively with the cumulative effect of initially applying the guidance recognized at the date of initial application (modified retrospective method). We anticipate adopting the standard using the modified retrospective method. There may be differences in timing of revenue recognition under the new standard compared to recognition under ASC 605 - Revenue Recognition. We have completed an initial assessment of our North America operations and are currently reviewing our Europe operations that we acquired in the second quarter. 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. Early adoption is permitted. We are evaluating the impact this guidance will have on our statement of cash flows. In October 2016, the FASB issued an ASU entitled “Income Taxes (Topic 230): Intra-Entity Transfers of Assets Other than Inventory.” The objective of the ASU is to improve the accounting for the income tax consequences of intra-entity transfers of assets other than inventory. This ASU is effective for fiscal years beginning after December 15, 2017, 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 statement of operations. In November 2016, the FASB issued an ASU entitled “Statement of Cash Flows (Topic 230): Restricted Cash.” The objective of the ASU is to address the diversity in practice that exists in the classification and presentation of changes in restricted cash on the statement of cash flows. This ASU is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Early adoption is permitted. 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 statement 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. Early adoption is permitted. We are evaluating the impact this guidance will have on our financial position and statement of operations. 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. Early adoption is permitted. We are evaluating the impact this guidance will have on our financial position and statement 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. Early adoption is permitted. We are evaluating the impact this guidance will have on our financial position and statement 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
Fair Value Measurements	The company applies fair value accounting for all financial assets and liabilities and non-financial Level 1 – Quoted prices in active markets for identical assets or liabilities. Level 2 – Observable inputs other than quoted prices in active markets for identical assets and liabilities, quoted prices for identical or similar assets or liabilities in inactive markets, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 3 – Inputs that are generally unobservable and typically reflect management’s estimate of assumptions that market participants would use in pricing the asset or liability.
Derivatives, Methods of Accounting, Hedging Derivatives	Debt Instruments The carrying values of the company’s debt instruments vary from their fair values. The fair values were determined by reference to transacted prices of these securities (Level 2 input based on the GAAP fair value hierarchy). The estimated fair value, as well as the carrying value, of the company’s debt instruments are shown below (in thousands): October 1, 2017 (Dollars in thousands) Estimated aggregate fair value $ 688,174 Aggregate carrying value (1) 705,096 (1) Long-term debt excluding the impact of unamortized debt issuance costs. Derivative Instruments and Hedging Activities We use derivatives to partially offset our business exposure to foreign currency risk. We may enter into forward contracts, option contracts, swaps, collars or other derivative instruments to offset some of the risk on expected future cash flows and on certain existing assets and liabilities. However, we may choose not to hedge certain exposures for a variety of reasons including, but not limited to, accounting considerations and the prohibitive economic cost of hedging particular exposures. There can be no assurance the hedges will offset more than a portion of the financial impact resulting from movements in foreign currency exchange rates. To help protect gross margins from fluctuations in foreign currency exchange rates, certain of our subsidiaries whose functional currency is the U.S. dollar hedge a portion of forecasted foreign currency costs. Generally, we may hedge portions of our forecasted foreign currency exposure associated with costs, typically for up to 48 months. We record all derivatives in the condensed consolidated balance sheets at fair value. Our accounting treatment for these instruments is based on the hedge designation. The effective portions of cash flow hedges are recorded in Accumulated Other Comprehensive Income (“AOCI”) until the hedged item is recognized in earnings. The ineffective portions of cash flow hedges are recorded in cost of sales. Derivatives that are not designated as hedging instruments are adjusted to fair value through earnings in the financial statement line item to which the derivative relates. All derivatives were designated as hedging instruments at December 31, 2016. At October 1, 2017, the company held derivatives that were designated as hedging instruments as well as derivatives that did not qualify for designation as hedging instruments as discussed below. Deferred gains and losses associated with cash flow hedges of foreign currency costs are recognized as a component of cost of sales in the same period as the related cost is recognized. Our foreign currency transactions hedged with cash flow hedges as of October 1, 2017, are expected to occur within 1 month to 48 months. Derivative instruments designated as cash flow hedges must be de-designated two-month re-designated Currency option derivative contracts not designated as hedging instruments consist principally of certain option contracts to purchase Polish Zloty and the Euro related to the acquisition of Uniwheels and a cross currency swap. See Note 3, “Acquisition.”
Derivatives, Methods of Accounting, Derivatives Not Designated or Qualifying as Hedges	Derivatives that are not designated as hedging instruments are adjusted to fair value through earnings in the financial statement line item to which the derivative relates.
Short-Term 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
Earnings Per Share	In accordance with U.S. GAAP, basic earnings per share is computed by dividing net income (loss), less preferred dividends, by the weighted average number of common shares outstanding. 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 of our redeemable preferred stock, outstanding stock options and time and performance based restricted stock units under the treasury stock method, which includes consideration of stock-based compensation required by U.S. GAAP.

Acquisition (Tables)

Acquisition (Tables)	9 Months Ended
	Oct. 01, 2017
Business Combinations [Abstract]
Summary of Purchase Price Allocation	During the second quarter of 2017, the company determined a preliminary valuation of the identifiable assets acquired and the liabilities assumed. The following is the allocation of the purchase price: (Dollars in thousands) Estimated purchase price Cash consideration $ 703,000 Non-controlling 63,200 Preliminary purchase price allocation Cash and cash equivalents 12,296 Accounts receivable 60,580 Inventories 82,402 Prepaid expenses and other current assets 11,479 Total current assets 166,757 Property and equipment 250,000 Intangible assets (1) 212,000 Goodwill 306,154 Other assets 20,937 Total assets acquired 955,848 Accounts payable 61,883 Other current liabilities 40,361 Total current liabilities 102,244 Other long-term liabilities 87,404 Total liabilities assumed 189,648 Net assets acquired $ 766,200 (1) Intangible assets are recorded at estimated fair value, as determined by management based on available information which includes a preliminary valuation prepared by an independent third party. The fair values assigned to identifiable intangible assets were determined through the use of the income approach, specifically the relief from royalty and multi-period excess earnings methods. The major assumptions used in arriving at the estimated identifiable intangible asset values included management’s estimates of future cash flows, discounted at an appropriate rate of return which are based on the weighted average cost of capital for both the company and other market participants. The useful lives for intangible assets were determined based upon the remaining useful economic lives of the intangible assets that are expected to contribute directly or indirectly to future cash flows. The estimated fair value of intangible assets and related useful lives as included in the preliminary purchase price allocation include: Estimated Fair Estimated (Dollars in thousands) Brand name $ 9,000 5-6 Technology 16,000 4-6 Customer relationships 167,000 6-11 Trade names 20,000 Indefinite $ 212,000
Summary of Unaudited Pro Forma Information	Three Months Ended Nine Months Ended October 1, 2017 September 25, October 1, September 25, Proforma Proforma Proforma Proforma (Dollars in thousands) Net sales as reported $ 331,404 $ 175,580 $ 746,252 $ 544,354 Uniwheels sales, prior to the Acquisition — 124,813 243,744 373,614 Proforma combined sales $ 331,404 $ 300,393 $ 989,996 $ 917,968 Net (loss) income as reported $ 2,615 $ 5,974 $ (1,554 ) $ 33,602 Uniwheels net income before income taxes, prior to the Acquisition — 15,282 25,394 47,749 Incremental interest expense on the debt — (10,630 ) (17,716 ) (31,889 ) Incremental amortization on the identifiable intangible assets — (6,187 ) (10,312 ) (18,562 ) Transaction expenses incurred by both the company and Uniwheels 10,079 — 27,572 — Income tax expense related to the proforma adjustments (3,528 ) 1,653 (6,877 ) 4,528 Proforma net income (loss) $ 9,166 $ 6,092 $ 16,507 $ 35,428

Restructuring (Tables)

Restructuring (Tables)	9 Months Ended
	Oct. 01, 2017
Restructuring and Related Activities [Abstract]
Summary of Rogers, Arkansas Plant Closure Costs	The following table summarizes the Rogers, Arkansas plant closure costs and classification in the consolidated income statement for the period ended October 1, 2017: (Dollars in thousands) Costs Incurred Costs Incurred Total Costs Classification Accelerated and other depreciation of assets idled $ 7,254 $ 13 $ 7,267 Cost of sales, Severance costs 2,011 — 2,011 Cost of sales, Equipment removal and impairment, inventory written-down, lease termination and other costs 6,634 117 6,751 Cost of sales, 15,899 130 16,029 Gain on sale of the facility (1,436 ) — (1,436 ) Total $ 14,463 $ 130 $ 14,593

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Oct. 01, 2017
Fair Value Disclosures [Abstract]
Summary of Items Measured at Fair Value	The following table categorizes items measured at fair value at October 1, 2017: Fair Value Measurement at Reporting Date Using Quoted Prices Significant Other Significant October 1, 2017 Total (Level 1) (Level 2) (Level 3) (Dollars in thousands) Assets Certificates of deposit $ 750 $ — $ 750 $ — Cash surrender value 7,944 — 7,944 — Derivative contracts 8,248 — 8,248 — Total $ 16,942 $ — $ 16,942 $ — Liabilities Derivative contracts $ 7,750 $ — $ 7,750 $ — Embedded derivative liability 6,768 — — 6,768 Total $ 14,518 $ — $ 7,750 $ 6,768 The following table categorizes items measured at fair value at December 31, 2016: Fair Value Measurement at Reporting Date Using December 31, 2016 Total Quoted Prices Significant Other (Level 2) Significant (Level 3) (Dollars in thousands) Assets Certificates of deposit $ 750 $ — $ 750 $ — Cash surrender value 7,480 — 7,480 — Derivative contracts 13 — 13 — Total $ 8,243 $ — $ 8,243 $ — Liabilities Derivative contracts $ 24,773 $ — $ 24,773 $ — Total $ 24,773 $ — $ 24,773 $ —

Financial Instruments (Tables)

Financial Instruments (Tables)	9 Months Ended
	Oct. 01, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments	The estimated fair value, as well as the carrying value, of the company’s debt instruments are shown below (in thousands): October 1, 2017 (Dollars in thousands) Estimated aggregate fair value $ 688,174 Aggregate carrying value (1) 705,096 (1) Long-term debt excluding the impact of unamortized debt issuance costs.
Summary of Fair Value of Derivatives by Balance Sheet Line Item	The following tables display the fair value of derivatives by balance sheet line item at October 1, 2017 and December 31, 2016: October 1, 2017 Other Current Other Non-current Accrued Other Non-current (Dollars in thousands) Foreign exchange forward contracts and collars designated as hedging instruments $ 2,856 $ 4,410 $ 3,053 $ 2,700 Aluminum forward contracts not designated as hedges 982 — 35 — Cross currency swap not designated as hedging instrument — — 654 1,308 Embedded derivative liability — — — 6,768 Total derivative financial instruments $ 3,838 $ 4,410 $ 3,742 $ 10,776 December 31, 2016 Other Current Other Non-current Accrued Other Non-current (Dollars in thousands) Foreign exchange forward contracts and collars designated as hedging instruments $ 13 $ — $ 10,076 $ 14,697 Total derivative financial instruments $ 13 $ — $ 10,076 $ 14,697
Summary of Notional Amount and Estimated Fair Value of Derivative Financial Instruments	The following table summarizes the notional amount and estimated fair value of our derivative financial instruments: October 1, 2017 December 31, 2016 Notional Fair Value Notional Fair Value (Dollars in thousands) Foreign currency forward contracts and collars designated as hedging instruments $ 287,255 $ 1,513 $ 160,461 $ (24,760 ) Aluminum forward contracts not designated as hedges 13,588 947 — — Cross currency swap not designated as hedging instrument 36,453 (1,962 ) — — Total derivative financial instruments $ 337,296 $ 498 $ 160,461 $ (24,760 )
Schedule of Impact of Derivative Instruments Designated as Cash Flow Hedges	The following table provides the impact of derivative instruments designated as cash flow hedges on our statement of operations: Nine Months ended October 1, 2017 Amount of Gain or (Loss) Amount of Pre-tax Amount of Pre-tax Gain or (Dollars in thousands) Foreign currency forward contracts and collars $ 25,438 $ (3,630 ) $ 59 Total $ 25,438 $ (3,630 ) $ 59 Nine Months ended September 25, Amount of Gain or (Loss) Amount of Pre-tax Amount of Pre-tax Gain or (Dollars in thousands) Foreign currency forward contracts and collars $ 8,227 $ 9,777 $ 133 Total $ 8,227 $ 9,777 $ 133

Business Segments (Tables)

Business Segments (Tables)	9 Months Ended
	Oct. 01, 2017
Segment Reporting [Abstract]
Summary of Net Sales and Results of Operations and Total Assets by Reportable Segment	Net Sales and Results of Operations by Reportable Segment Three Months Ended Nine Months Ended October 1, 2017 September 25, 2016 October 1, 2017 September 25, 2016 (Dollars in thousands) Net sales: North America $ 180,100 $ 175,580 $ 541,218 $ 544,354 Europe 151,304 — 205,034 — Consolidated net sales $ 331,404 $ 175,580 $ 746,252 $ 544,354 Income from operations: North America $ 1,413 $ 5,250 $ 4,260 $ 43,512 Europe 4,345 — 3,444 — Consolidated income from operations $ 5,758 $ 5,250 $ 7,704 $ 43,512 Total Assets by Reportable Segment October 1, 2017 December 31, 2016 (Dollars in thousands) North America $ 554,408 $ 542,756 Europe 1,008,947 — Total assets $ 1,563,355 $ 542,756

Inventories (Tables)

Inventories (Tables)	9 Months Ended
	Oct. 01, 2017
Inventory Disclosure [Abstract]
Summary of Inventories	October 1, 2017 December 31, 2016 (Dollars in thousands) Raw materials $ 59,744 $ 40,255 Work in process 53,711 21,447 Finished goods 64,642 21,135 Inventories $ 178,097 $ 82,837

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	9 Months Ended
	Oct. 01, 2017
Property, Plant and Equipment [Abstract]
Schedule of Property, Plant and Equipment	October 1, 2017 December 31, 2016 (Dollars in thousands) Land and buildings $ 138,570 $ 67,915 Machinery and equipment 699,817 485,185 Leasehold improvements and others 11,141 4,868 Construction in progress 53,686 26,301 903,214 584,269 Accumulated depreciation (384,956 ) (356,866 ) Property, plant and equipment, net $ 518,258 $ 227,403

Preproduction Costs Related t37

Preproduction Costs Related to Long-Term Supply Arrangements (Tables)	9 Months Ended
	Oct. 01, 2017
Accounting Policies [Abstract]
Summary of Unamortize Customer-Owned Tooling Costs Included in Non-current Assets and Deferred Tooling Revenues Included in Accrued Expenses and Other Non-current Liabilities	The following tables summarize the unamortized customer-owned tooling costs included in our non-current non-current October 1, 2017 December 31, 2016 (Dollars in thousands) Customer-Owned Tooling Costs Preproduction costs $ 82,751 $ 78,299 Accumulated amortization (69,954 ) (65,100 ) Net preproduction costs $ 12,797 $ 13,199 Deferred Tooling Revenues Accrued expenses $ 5,436 $ 5,419 Other non-current 2,439 2,593 Total deferred tooling revenues $ 7,875 $ 8,012

Goodwill and Other Intangible38

Goodwill and Other Intangible Assets (Tables)	9 Months Ended
	Oct. 01, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Finite-Lived and Indefinite-Lived Intangible Assets	Following is a summary of the company’s finite-lived and indefinite-lived intangible assets as of October 1, 2017. There were no such intangible assets at December 31, 2016. Gross Accumulated Currency Net Remaining (Dollars in thousands Brand name $ 9,000 $ (516 ) $ 447 $ 8,931 5-6 Technology 16,000 (1,102 ) 792 15,690 4-6 Customer relationships 167,000 (7,446 ) 8,335 167,889 6-11 Total finite 192,000 (9,064 ) 9,574 192,510 Trade names 20,000 — 1,014 21,014 Indefinite Total $ 212,000 $ (9,064 ) $ 10,588 $ 213,524

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Oct. 01, 2017
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	(Dollars and shares in thousands, except per share amounts) Three Months Ended Nine Months Ended October 1, September 25, October 1, September 25, Basic Income Per Share: Reported net income (loss) $ 2,615 $ 5,974 $ (1,554 ) $ 33,602 Less: Redeemable preferred stock dividends (8,147 ) — (11,029 ) — Basic numerator $ (5,532 ) $ 5,974 $ (12,583 ) $ 33,602 Basic (loss) income per share $ (0.22 ) $ 0.24 $ (0.50 ) $ 1.32 Weighted average shares outstanding-Basic 24,905 25,424 24,941 25,482 Diluted Income Per Share: Reported net income (loss) $ 2,615 $ 5,974 $ (1,554 ) $ 33,602 Less: Redeemable preferred stock dividends (8,147 ) — (11,029 ) — Diluted numerator $ (5,532 ) $ 5,974 $ (12,583 ) $ 33,602 Diluted (loss) income per share $ (0.22 ) $ 0.23 $ (0.50 ) $ 1.31 Weighted average shares outstanding-Basic 24,905 25,424 24,941 25,482 Weighted average dilutive stock options and restricted stock units — 146 — 97 Weighted average shares outstanding-Diluted 24,905 25,570 24,941 25,579

Retirement Plans (Tables)

Retirement Plans (Tables)	9 Months Ended
	Oct. 01, 2017
Retirement Benefits [Abstract]
Summary of Components of Net Periodic Pension Cost	The following table summarizes the components of net periodic pension cost for the first nine months of 2017 and 2016. Three Months Ended Nine Months Ended October 1, September 25, October 1, September 25, (Dollars in thousands) Service cost $ — $ — $ — $ — Interest cost 298 304 894 912 Net amortization 67 84 201 252 Net periodic pension cost $ 365 $ 388 $ 1,095 $ 1,164

Debt (Tables)

Debt (Tables)	9 Months Ended
	Oct. 01, 2017
Debt Disclosure [Abstract]
Summary of Long-Term Debt and Related Weighted Average Interest Rates	A summary of long-term debt and the related weighted average interest rates is shown below (in thousands): October 1, 2017 Debt Instrument Long-Term Debt (1) Long-Term Weighted Term loan facility $ 387,800 $ (12,957 ) $ 374,843 5.5 % 6.00% Senior Notes due 2025 294,166 (7,919 ) 286,247 6.0 % Other 23,130 (3,316 ) 19,814 1.0 % $ 705,096 $ (24,192 ) 680,904 Less: Current portion (5,800 ) Long-term debt $ 675,104 (1)

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	9 Months Ended
	Oct. 01, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of Stock Option Activity	Stock option activity in the first nine months of 2017 is summarized in the following table: Outstanding Weighted Average Exercise Price Remaining Contractual Life in Years Aggregate Intrinsic Value Balance at December 31, 2016 231,625 $ 18.88 3.1 $ 1,845,263 Granted — $ — Exercised (2,000 ) $ 16.76 Canceled (6,000 ) $ 21.09 Expired — $ — Balance at October 1, 2017 223,625 $ 18.84 Options vested or expected to vest at October 1, 2017 223,625 $ 18.84 1.6 $ 51,478 Exercisable at October 1, 2017 223,625 $ 18.84 1.6 $ 51,478
Summary of Restricted Stock Activity	Restricted stock activity in the first nine months of 2017 is summarized in the following table: Number Weighted Average Weighted Average Balance at December 31, 2016 144,295 $ 19.43 0.5 Granted — $ — Vested (137,823 ) $ 19.43 Canceled (3,667 ) $ 19.16 Balance at October 1, 2017 2,805 $ 19.72 0.2
Summary of Restricted Stock Unit Activity	Restricted stock unit activity in the first nine months of 2017 is summarized in the following table: Number of Weighted Average Weighted Average Balance at December 31, 2016 127,567 $ 22.03 1.7 Granted 131,656 $ 22.24 Vested (37,844 ) $ 23.72 Canceled (22,068 ) $ 22.95 Balance at October 1, 2017 199,311 $ 21.74 1.7
Summary of Restricted Performance Stock Unit Activity	Restricted performance stock unit activity in the first nine months of 2017 is summarized in the following table: Number of Weighted Average Weighted Average Balance at December 31, 2016 227,193 $ 21.72 1.6 Granted 164,566 $ 22.39 Vested — $ — Canceled (63,166 ) $ 22.47 Balance at October 1, 2017 328,593 $ 21.92 1.9
Summary of Stock-based Compensation Expense	Stock-based compensation expense related to our equity incentive plans in accordance with U.S. GAAP was allocated as follows: Three Months Ended Nine Months Ended October 1, September 25, October 1, September 25, (Dollars in thousands) Cost of sales $ 85 $ 6 $ 134 $ 364 Selling, general and administrative expenses (100 ) 338 838 2,294 Stock-based compensation expense before income taxes (15 ) 344 972 2,658 Income tax benefit 6 (123 ) (358 ) (771 ) Total stock-based compensation expense after income taxes $ (9 ) $ 221 $ 614 $ 1,887

Nature of Operations - Addition

Nature of Operations - Additional Information (Detail) - Sales Revenue, Goods, Net [Member] - Customer Concentration Risk [Member]	9 Months Ended
	Oct. 01, 2017
Ford, GM and Toyota [Member]
Concentration Risk [Line Items]
Percentage of total revenue	56.00%
Nissan [Member]
Concentration Risk [Line Items]
Percentage of total revenue	6.00%
Fiat Chrysler [Member]
Concentration Risk [Line Items]
Percentage of total revenue	4.00%
Ford, GM, Toyota, Fiat, and Chrysler Companies [Member]
Concentration Risk [Line Items]
Percentage of total revenue	66.00%

Acquisition - Additional Inform

Acquisition - Additional Information (Detail) $ in Thousands	Jul. 31, 2017shares	May 30, 2017USD ($)	Jun. 25, 2017USD ($)	Dec. 31, 2017USD ($)	Oct. 01, 2017USD ($)	Oct. 01, 2017PLN / shares	Apr. 12, 2017	Mar. 23, 2017PLN / shares	Dec. 31, 2016USD ($)
Business Acquisition [Line Items]
Percentage of voting interest acquired		92.30%
Exchange rate (dollar per polish zloty)		3.74193
Goodwill			$ 306,154		$ 321,671				$ 0
Uniwheels Acquisition [Member]
Business Acquisition [Line Items]
Tender offer percentage								100.00%
Acquiree commitment percentage								61.00%
Minimum purchase percentage							75.00%
Cash consideration		$ 703,000	703,000
Share price (in polish zloty per share) | PLN / shares						PLN 247.87
Remaining shares tendered | shares	153,251
Percentage of additional shares tendered	1.20%
Ownership percentage by noncontrolling owners		6.50%
Goodwill			306,154
Europe [Member] | Uniwheels Acquisition [Member]
Business Acquisition [Line Items]
Goodwill			$ 306,200		$ 321,700
Scenario, Forecast [Member] | Uniwheels Acquisition [Member]
Business Acquisition [Line Items]
Cash consideration				$ 778,000
Payments to acquire business including impact of hedge				$ 766,200
Significant Holder [Member] | Uniwheels Acquisition [Member]
Business Acquisition [Line Items]
Share price (in polish zloty per share) | PLN / shares								PLN 226.5
Uniwheels Other Shareholders [Member] | Uniwheels Acquisition [Member]
Business Acquisition [Line Items]
Share price (in polish zloty per share) | PLN / shares								PLN 247.87
Share price additional percentage								5.00%

Acquisition - (Schedule of Asse

Acquisition - (Schedule of Assets and Liabilities Acquired) (Detail) - USD ($) $ in Thousands	May 30, 2017	Jun. 25, 2017	Oct. 01, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Goodwill		$ 306,154	$ 321,671	$ 0
Uniwheels Acquisition [Member]
Business Acquisition [Line Items]
Cash consideration	$ 703,000	703,000
Non-controlling interest		63,200
Cash and cash equivalents		12,296
Accounts receivable		60,580
Inventories		82,402
Prepaid expenses and other current assets		11,479
Total current assets		166,757
Property and equipment		250,000
Intangible assets		212,000
Goodwill		306,154
Other assets		20,937
Total assets acquired		955,848
Accounts payable		61,883
Other current liabilities		40,361
Total current liabilities		102,244
Other long-term liabilities		87,404
Total liabilities assumed		189,648
Net assets acquired		$ 766,200

Acquisition (Schedule of Intang

Acquisition (Schedule of Intangibles Acquired) (Detail) $ in Thousands	3 Months Ended
	Jun. 25, 2017USD ($)
Uniwheels Acquisition [Member]
Business Acquisition [Line Items]
Intangible assets	$ 212,000
Uniwheels Acquisition [Member] | Brand Name [Member]
Business Acquisition [Line Items]
Finite-lived intangibles acquired	9,000
Uniwheels Acquisition [Member] | Technology [Member]
Business Acquisition [Line Items]
Finite-lived intangibles acquired	16,000
Uniwheels Acquisition [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Finite-lived intangibles acquired	167,000
Uniwheels Acquisition [Member] | Trade Names [Member]
Business Acquisition [Line Items]
Indefinite-lived intangibles acquired	$ 20,000
Minimum [Member] | Brand Name [Member]
Business Acquisition [Line Items]
Acquired intangible useful lives	5 years
Minimum [Member] | Technology [Member]
Business Acquisition [Line Items]
Acquired intangible useful lives	4 years
Minimum [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Acquired intangible useful lives	6 years
Maximum [Member] | Brand Name [Member]
Business Acquisition [Line Items]
Acquired intangible useful lives	6 years
Maximum [Member] | Technology [Member]
Business Acquisition [Line Items]
Acquired intangible useful lives	6 years
Maximum [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Acquired intangible useful lives	11 years

Acquisition Acquisition (ProFor

Acquisition Acquisition (ProForma) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2017	Sep. 25, 2016	Oct. 01, 2017	Sep. 25, 2016
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Net sales as reported	$ 331,404	$ 175,580	$ 746,252	$ 544,354
Proforma combined sales	331,404	300,393	989,996	917,968
Net (loss) income	2,615	5,974	(1,554)	33,602
Proforma net income (loss)	9,166	6,092	16,507	35,428
Uniwheels Sales, Prior to the Acquisition [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Net sales as reported		124,813	243,744	373,614
Uniwheels Net Income Before Income Taxes, Prior to the Acquisition [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Net (loss) income		15,282	25,394	47,749
Incremental Interest Expense on the Debt [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Net (loss) income		(10,630)	(17,716)	(31,889)
Incremental Amortization on the Identifiable Intangible Assets [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Net (loss) income		(6,187)	(10,312)	(18,562)
Transaction Expenses Incurred by Both the Company and Uniwheels [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Net (loss) income	10,079		27,572
Income Tax Expense Related to the Proforma Adjustments [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Net (loss) income	$ (3,528)	$ 1,653	$ (6,877)	$ 4,528

Restructuring - Additional Info

Restructuring - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended		36 Months Ended
	Dec. 31, 2016	Oct. 01, 2017	Sep. 25, 2016	Dec. 31, 2016
Rogers Arkansas Facility Closure [Member]
Restructuring Cost and Reserve [Line Items]
Gain on sale of the facility				$ 1,436
Expected Restructuring Charges		$ 16,029
Restructuring and Related Cost, Incurred Cost		130		$ 15,899
Cost of Sales [Member] | Rogers Arkansas Facility Closure [Member]
Restructuring Cost and Reserve [Line Items]
Expected Restructuring Charges		16,000
Restructuring and Related Cost, Incurred Cost		100	$ 200
Building [Member]
Restructuring Cost and Reserve [Line Items]
Proceeds from sale of buildings	$ 4,300
Gain on sale of the facility	$ 1,400
Building [Member] | Rogers Arkansas Facility Closure [Member]
Restructuring Cost and Reserve [Line Items]
Gain on sale of the facility		$ 1,436

Restructuring (Detail)

Restructuring (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended		36 Months Ended
	Dec. 31, 2016	Oct. 01, 2017	Sep. 25, 2016	Dec. 31, 2016
Building [Member]
Restructuring Cost and Reserve [Line Items]
Gain on sale of the facility	$ (1,400)
Rogers Arkansas Facility Closure [Member]
Restructuring Cost and Reserve [Line Items]
Expected Restructuring Charges		$ 16,029
Restructuring and Related Cost, Incurred Cost		130		$ 15,899
Gain on sale of the facility				(1,436)
Rogers Arkansas Facility Closure [Member] | Building [Member]
Restructuring Cost and Reserve [Line Items]
Gain on sale of the facility		(1,436)
Rogers Arkansas Facility Closure [Member] | Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Expected Restructuring Charges		16,000
Restructuring and Related Cost, Incurred Cost		100	$ 200
Rogers Arkansas Facility Closure [Member] | Accelerated Depreciation [Member] | Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Accelerated Depreciation		13		7,254
Expected Restructuring Charges		7,267
Rogers Arkansas Facility Closure [Member] | One-time Termination Benefits [Member] | Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Expected Restructuring Charges		2,011
Restructuring and Related Cost, Incurred Cost				2,011
Rogers Arkansas Facility Closure [Member] | Other Restructuring [Member] | Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Expected Restructuring Charges		6,751
Restructuring and Related Cost, Incurred Cost		117		6,634
Rogers Arkansas Facility Closure [Member] | Restructuring Costs All Costs [Member]
Restructuring Cost and Reserve [Line Items]
Expected Restructuring Charges	$ 14,463	14,593		$ 14,463
Restructuring and Related Cost, Incurred Cost		$ 130

Fair Value Measurements - Recur

Fair Value Measurements - Recurring (Detail) - USD ($) $ in Thousands	Oct. 01, 2017	May 22, 2017	Dec. 31, 2016
Liabilities
Embedded derivative liability	$ 6,768	$ 10,900	$ 0
Recurring [Member]
Assets
Derivative contracts	8,248		13
Total	16,942		8,243
Liabilities
Derivative contracts	7,750		24,773
Embedded derivative liability	6,768
Total	14,518		24,773
Recurring [Member] | Certificates of Deposit [Member]
Assets
Certificates of deposit	750		750
Recurring [Member] | Cash Surrender Value [Member]
Assets
Cash surrender value	7,944		7,480
Recurring [Member] | Level 1 [Member]
Assets
Derivative contracts	0
Total	0
Liabilities
Derivative contracts	0
Embedded derivative liability	0
Total	0
Recurring [Member] | Level 1 [Member] | Certificates of Deposit [Member]
Assets
Certificates of deposit	0
Recurring [Member] | Level 1 [Member] | Cash Surrender Value [Member]
Assets
Cash surrender value	0
Recurring [Member] | Level 2 [Member]
Assets
Derivative contracts	8,248		13
Total	16,942		8,243
Liabilities
Derivative contracts	7,750		24,773
Total	7,750		24,773
Recurring [Member] | Level 2 [Member] | Certificates of Deposit [Member]
Assets
Certificates of deposit	750		750
Recurring [Member] | Level 2 [Member] | Cash Surrender Value [Member]
Assets
Cash surrender value	7,944		$ 7,480
Recurring [Member] | Level 3 [Member]
Assets
Derivative contracts	0
Total	0
Liabilities
Derivative contracts	0
Embedded derivative liability	6,768
Total	6,768
Recurring [Member] | Level 3 [Member] | Certificates of Deposit [Member]
Assets
Certificates of deposit	0
Recurring [Member] | Level 3 [Member] | Cash Surrender Value [Member]
Assets
Cash surrender value	$ 0

Financial Instruments - Schedul

Financial Instruments - Schedule of Carrying Values and Estimated Fair Values of Debt Instruments (Detail) $ in Thousands	Oct. 01, 2017USD ($)
Estimate of Fair Value Measurement [Member]
Derivatives, Fair Value [Line Items]
Long-term debt fair value	$ 688,174
Aggregate Carrying Value [Member]
Derivatives, Fair Value [Line Items]
Long-term debt fair value	$ 705,096

Financial Instruments - Additio

Financial Instruments - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 01, 2017	Sep. 25, 2016	Oct. 01, 2017	Sep. 25, 2016	May 22, 2017	Dec. 31, 2016
Derivatives, Fair Value [Line Items]
Maximum length of time, foreign currency cash flow hedge			48 months
Convertible preferred stock, redemption Value	$ 300,000,000		$ 300,000,000
Fair value of embedded derivative liability	6,768,000		6,768,000		$ 10,900,000	$ 0
Change in fair value of redeemable preferred stock embedded derivative liability	$ 4,081,000	$ 0	$ 4,081,000	$ 0
Minimum [Member]
Derivatives, Fair Value [Line Items]
Derivative, Remaining Maturity			1 year
Maximum [Member]
Derivatives, Fair Value [Line Items]
Derivative, Remaining Maturity			48 months
Embedded derivative liability [Member]
Derivatives, Fair Value [Line Items]
Redemption per share	$ 56.324		$ 56.324
Debt instrument face value	$ 150,000,000		$ 150,000,000
Convertible preferred stock, redemption Value	$ 300,000,000		$ 300,000,000
Volatility rate			32.00%
Risky bond rate	19.10%		19.10%
Dividend yield rate			2.20%
Stock price per share	$ 16.65		$ 16.65		$ 19.05
Embedded derivative liability [Member] | Minimum [Member]
Derivatives, Fair Value [Line Items]
Valuation scenario term			4 years 2 months 30 days
Risk-free interest rate			1.81%
Embedded derivative liability [Member] | Maximum [Member]
Derivatives, Fair Value [Line Items]
Valuation scenario term			6 years 7 months 21 days
Risk-free interest rate			2.12%

Financial Instruments - Summary

Financial Instruments - Summary of Fair Value of Derivatives by Balance Sheet Line Item (Detail) - USD ($) $ in Thousands	Oct. 01, 2017	Dec. 31, 2016
Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	$ 3,838	$ 13
Other Non-current Assets [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	4,410	0
Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative liabilities	3,742	10,076
Other Non-current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative liabilities	10,776	14,697
Foreign Exchange Forward Contracts and Collars Designated as Hedging Instruments [Member] | Designated as Hedging Instrument [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	2,856	13
Foreign Exchange Forward Contracts and Collars Designated as Hedging Instruments [Member] | Designated as Hedging Instrument [Member] | Other Non-current Assets [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	4,410	0
Foreign Exchange Forward Contracts and Collars Designated as Hedging Instruments [Member] | Designated as Hedging Instrument [Member] | Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative liabilities	3,053	10,076
Foreign Exchange Forward Contracts and Collars Designated as Hedging Instruments [Member] | Designated as Hedging Instrument [Member] | Other Non-current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative liabilities	2,700	$ 14,697
Aluminum Forward Contracts Not Designated as Hedges [Member] | Not Designated as Hedging Instrument [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	982
Aluminum Forward Contracts Not Designated as Hedges [Member] | Not Designated as Hedging Instrument [Member] | Other Non-current Assets [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	0
Aluminum Forward Contracts Not Designated as Hedges [Member] | Not Designated as Hedging Instrument [Member] | Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative liabilities	35
Aluminum Forward Contracts Not Designated as Hedges [Member] | Not Designated as Hedging Instrument [Member] | Other Non-current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative liabilities	0
Cross Currency Swap Not Designated as Hedging Instrument [Member] | Not Designated as Hedging Instrument [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	0
Cross Currency Swap Not Designated as Hedging Instrument [Member] | Not Designated as Hedging Instrument [Member] | Other Non-current Assets [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	0
Cross Currency Swap Not Designated as Hedging Instrument [Member] | Not Designated as Hedging Instrument [Member] | Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative liabilities	654
Cross Currency Swap Not Designated as Hedging Instrument [Member] | Not Designated as Hedging Instrument [Member] | Other Non-current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative liabilities	1,308
Embedded derivative liability [Member] | Not Designated as Hedging Instrument [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	0
Embedded derivative liability [Member] | Not Designated as Hedging Instrument [Member] | Other Non-current Assets [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative assets	0
Embedded derivative liability [Member] | Not Designated as Hedging Instrument [Member] | Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative liabilities	0
Embedded derivative liability [Member] | Not Designated as Hedging Instrument [Member] | Other Non-current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair value of derivative liabilities	$ 6,768

Financial Instruments - Summa54

Financial Instruments - Summary of Notional Amount and Estimated Fair Value of Derivative Financial Instruments (Detail) - USD ($) $ in Thousands	Oct. 01, 2017	Dec. 31, 2016
Derivatives, Fair Value [Line Items]
Derivative Asset, Notional Amount	$ 337,296	$ 160,461
Derivative, Fair Value, Net	498	(24,760)
Designated as Hedging Instrument [Member] | Foreign Exchange Forward Contracts and Collars Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Notional Amount	287,255	160,461
Derivative, Fair Value, Net	1,513	(24,760)
Not Designated as Hedging Instrument [Member] | Aluminum Forward Contracts Not Designated as Hedges [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Notional Amount	13,588	0
Derivative, Fair Value, Net	947	0
Not Designated as Hedging Instrument [Member] | Cross Currency Swap Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Notional Amount	36,453	0
Derivative, Fair Value, Net	$ (1,962)	$ 0

Financial Instruments - Sched55

Financial Instruments - Schedule of Impact of Derivative Instruments Designated as Cash Flow Hedges (Detail) - USD ($) $ in Thousands	9 Months Ended
	Oct. 01, 2017	Sep. 25, 2016
Derivatives, Fair Value [Line Items]
Amount of Gain or (Loss) Recognized in AOCI on Derivatives (Effective Portion)	$ 25,438	$ 8,227
Amount of Pre-tax Gain or (Loss) Reclassified from AOCI into Income (Effective Portion)	(3,630)	9,777
Amount of Pre-tax Gain or (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)	59	133
Foreign Exchange Forward Contracts and Collars Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Amount of Gain or (Loss) Recognized in AOCI on Derivatives (Effective Portion)	25,438	8,227
Amount of Pre-tax Gain or (Loss) Reclassified from AOCI into Income (Effective Portion)	(3,630)	9,777
Amount of Pre-tax Gain or (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)	$ 59	$ 133

Business Segments - Additional

Business Segments - Additional Information (Detail)	9 Months Ended
	Oct. 01, 2017Segment
Segment Reporting [Abstract]
Number of reportable segments	2

Business Segments - Summary of

Business Segments - Summary of Net Sales and Results of Operations and Total Assets by Reportable Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2017	Sep. 25, 2016	Oct. 01, 2017	Sep. 25, 2016	Dec. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales as reported	$ 331,404	$ 175,580	$ 746,252	$ 544,354
Income from operations	5,758	5,250	7,704	43,512
Total assets	1,563,355		1,563,355		$ 542,756
North America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales as reported	180,100	175,580	541,218	544,354
Income from operations	1,413	5,250	4,260	43,512
Total assets	554,408		554,408		542,756
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales as reported	151,304	0	205,034	0
Income from operations	4,345	$ 0	3,444	$ 0
Total assets	$ 1,008,947		$ 1,008,947		$ 0

Short-Term Investments - Additi

Short-Term Investments - Additional Information (Detail) - USD ($) $ in Thousands	Oct. 01, 2017	Dec. 31, 2016
Short-term Investments [Abstract]
Short-term investments	$ 750	$ 750

Inventories - Summary of Invent

Inventories - Summary of Inventories (Detail) - USD ($) $ in Thousands	Oct. 01, 2017	Dec. 31, 2016
Inventory Disclosure [Abstract]
Raw materials	$ 59,744	$ 40,255
Work in process	53,711	21,447
Finished goods	64,642	21,135
Inventories	$ 178,097	$ 82,837

Inventories - Additional Inform

Inventories - Additional Information (Detail) - USD ($) $ in Millions	Oct. 01, 2017	Dec. 31, 2016
Inventory Disclosure [Abstract]
Inventory, non-current	$ 8.5	$ 6.5
Supplies inventory	$ 13.6	$ 10.3

Property, Plant and Equipment -

Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	Oct. 01, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 903,214	$ 584,269
Accumulated depreciation	(384,956)	(356,866)
Property, plant and equipment, net	518,258	227,403
Land and Buildings [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	138,570	67,915
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	699,817	485,185
Leasehold Improvements and Others [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	11,141	4,868
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 53,686	$ 26,301

Property, Plant and Equipment62

Property, Plant and Equipment - Additional Information (Detail) - USD ($) $ in Millions	9 Months Ended
	Oct. 01, 2017	Sep. 25, 2016
Property, Plant and Equipment [Abstract]
Depreciation expense	$ 36.7	$ 25.9

Preproduction Costs Related t63

Preproduction Costs Related to Long-Term Supply Arrangements - Additional Information (Detail) - USD ($) $ in Millions	9 Months Ended
	Oct. 01, 2017	Sep. 25, 2016
Deferred Revenue [Abstract]
Deferred revenue, revenue recognized	$ 5.7	$ 6.2

Preproduction Costs Related t64

Preproduction Costs Related to Long-Term Supply Arrangements - Summary of Unamortized Customer-Owned Tooling Costs Included in Non-current Assets and Deferred Tooling Revenues Included in Accrued Expenses and Other Non-current Liabilities (Detail) - USD ($) $ in Thousands	Oct. 01, 2017	Dec. 31, 2016
Customer-Owned Tooling Costs
Preproduction costs	$ 82,751	$ 78,299
Accumulated amortization	(69,954)	(65,100)
Net preproduction costs	12,797	13,199
Deferred Tooling Revenues
Accrued expenses	5,436	5,419
Other non-current liabilities	2,439	2,593
Total deferred tooling revenues	$ 7,875	$ 8,012

Goodwill and Other Intangible65

Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($)	3 Months Ended
	Oct. 01, 2017	Jun. 25, 2017	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill impairment	$ 0
Indefinite-lived intangible asset impairment	0
Goodwill	321,671,000	$ 306,154,000	$ 0
Intangible assets	213,524,000		$ 0
Amortization of intangible assets	6,900,000
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2,018	27,200,000
2,019	27,200,000
2,020	27,200,000
2,021	27,200,000
2,022	$ 25,300,000

Goodwill and Other Intangible66

Goodwill and Other Intangible Assets - Summary of Finite-Lived and Indefinite-Lived Intangible Assets (Detail) - USD ($) $ in Thousands	9 Months Ended
	Oct. 01, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets, Gross Carrying Amount	$ 192,000
Indefinite-lived Intangible Assets, Gross Carrying Amount	20,000
Indefinite-lived Intangible Assets, Currency Translation	1,014
Indefinite-lived Intangible Assets, Net	21,014
Gross Carrying Amount	212,000
Accumulated Amortization	(9,064)
Finite-lived Intangible Assets, Currency Translation	9,574
Currency Translation	10,588
Finite-lived Intangible Assets, Net	192,510
Net	213,524	$ 0
Brand Name [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets, Gross Carrying Amount	9,000
Accumulated Amortization	(516)
Finite-lived Intangible Assets, Currency Translation	447
Finite-lived Intangible Assets, Net	8,931
Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets, Gross Carrying Amount	16,000
Accumulated Amortization	(1,102)
Finite-lived Intangible Assets, Currency Translation	792
Finite-lived Intangible Assets, Net	15,690
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets, Gross Carrying Amount	167,000
Accumulated Amortization	(7,446)
Finite-lived Intangible Assets, Currency Translation	8,335
Finite-lived Intangible Assets, Net	$ 167,889
Minimum [Member] | Brand Name [Member]
Finite-Lived Intangible Assets [Line Items]
Remaining Weighted Average Amortization Period	5 years
Minimum [Member] | Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Remaining Weighted Average Amortization Period	4 years
Minimum [Member] | Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Remaining Weighted Average Amortization Period	6 years
Maximum [Member] | Brand Name [Member]
Finite-Lived Intangible Assets [Line Items]
Remaining Weighted Average Amortization Period	6 years
Maximum [Member] | Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Remaining Weighted Average Amortization Period	6 years
Maximum [Member] | Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Remaining Weighted Average Amortization Period	11 years

Redeemable Preferred Shares - A

Redeemable Preferred Shares - Additional Information (Detail) - USD ($)	Aug. 30, 2017	May 22, 2017	Mar. 22, 2017	Oct. 01, 2017	Sep. 25, 2016	Dec. 31, 2016
Temporary Equity [Line Items]
Proceeds from issuance of redeemable preferred shares				$ 150,000,000	$ 0
Temporary equity, stock issued during period, shares, new issues				150,000		0
Temporary equity, par value				$ 0.01		$ 0.01
Convertible preferred stock, redemption Value				$ 300,000,000
Issuance costs		$ 3,700,000		3,737,000	$ 0
Proceeds from issuance of redeemable preferred shares, net of issuance costs		146,300,000
Embedded derivative liability		10,900,000		6,768,000		$ 0
Adjusted proceeds from issuance of redeemable preferred shares		$ 135,400,000
Accreted value				5,200,000
Convertible preferred stock				$ 140,641,000		$ 0
Debt Instrument Redemption Period One [Member]
Temporary Equity [Line Items]
Redemption period				7 years
Convertible Preferred Stock Redemption Period One [Member]
Temporary Equity [Line Items]
Convertible preferred stock, redemption Value				$ 262,500,000
Convertible preferred stock, redemption value percent of stated value				175.00%
Convertible Preferred Stock Redemption Period Two [Member]
Temporary Equity [Line Items]
Convertible preferred stock, redemption Value				$ 300,000,000
Convertible preferred stock, redemption value percent of stated value				200.00%
Convertible preferred stock, total shares issued upon conversion				5,300,000
Embedded derivative liability [Member]
Temporary Equity [Line Items]
Redemption per share				$ 56.324
Convertible preferred stock, redemption Value				$ 300,000,000
Stock price per share		$ 19.05		$ 16.65
Debt instrument face value				$ 150,000,000
Series A Redeemable Preferred Stock [Member]
Temporary Equity [Line Items]
Temporary equity, stock issued during period, shares, new issues			140,202
Temporary equity, liquidation preference per share			$ 1,000
Temporary equity, par value			0.01
Redemption per share			$ 28.162
Preferred stock, dividend rate, percentage			9.00%
Percentage of temporary equity stock issued during period to common stock outstanding			19.99%
Convertible preferred stock, threshold stock price trigger			$ 84.49
Series B Redeemable Preferred Stock [Member]
Temporary Equity [Line Items]
Temporary equity, stock issued during period, shares, new issues			9,798
Conversion of series B redeemable preferred stock into series A redeemable preferred stock	9,798

Earnings Per Share - Schedule o

Earnings Per Share - Schedule of Earnings Per Share, Basic and Diluted (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2017	Sep. 25, 2016	Oct. 01, 2017	Sep. 25, 2016
Basic Income Per Share:
Reported net income (loss)	$ 2,615	$ 5,974	$ (1,554)	$ 33,602
Less: Redeemable preferred stock dividends	(8,147)	0	(11,029)	0
Basic numerator	$ (5,532)	$ 5,974	$ (12,583)	$ 33,602
Basic (loss) income per share	$ (0.22)	$ 0.24	$ (0.50)	$ 1.32
Weighted average shares outstanding-Basic	24,905	25,424	24,941	25,482
Diluted Income Per Share:
Reported net income (loss)	$ 2,615	$ 5,974	$ (1,554)	$ 33,602
Less: Redeemable preferred stock dividends	(8,147)	0	(11,029)	0
Diluted numerator	$ (5,532)	$ 5,974	$ (12,583)	$ 33,602
Diluted (loss) income per share	$ (0.22)	$ 0.23	$ (0.50)	$ 1.31
Weighted average shares outstanding-Basic	24,905	25,424	24,941	25,482
Weighted average dilutive stock options and restricted stock units	0	146	0	97
Weighted average shares outstanding-Diluted	24,905	25,570	24,941	25,579

Earnings Per Share - Additional

Earnings Per Share - Additional Information (Detail)	9 Months Ended
	Oct. 01, 2017shares
Earnings Per Share [Abstract]
Anti-dilutive securities excluded from computation of earnings per share	0

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2017	Sep. 25, 2016	Oct. 01, 2017	Sep. 25, 2016
Income Tax Disclosure [Abstract]
Income tax benefit (provision)	$ 3,355	$ 1,064	$ 4,880	$ (9,576)
Pre-tax income (loss)	$ (501)	$ 4,910	$ (6,442)	$ 43,178
Effective income tax rate			(75.80%)	22.20%

Retirement Plans - Additional I

Retirement Plans - Additional Information (Detail) $ in Millions	9 Months Ended
	Oct. 01, 2017USD ($)Age	Dec. 31, 2016USD ($)
Retirement Benefits [Abstract]
Cash surrender value	$ 7.9	$ 7.5
Age for benefits | Age	65
Payments to retirees	$ 1.1
Anticipated benefit payments	$ 1.5

Retirement Plans - Schedule of

Retirement Plans - Schedule of Net Benefit Costs (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2017	Sep. 25, 2016	Oct. 01, 2017	Sep. 25, 2016
Retirement Benefits [Abstract]
Service cost	$ 0	$ 0	$ 0	$ 0
Interest cost	298	304	894	912
Net amortization	67	84	201	252
Net periodic pension cost	$ 365	$ 388	$ 1,095	$ 1,164

Debt - Summary of Long-Term Deb

Debt - Summary of Long-Term Debt and Related Weighted Average Interest Rates (Detail) - USD ($) $ in Thousands	Oct. 01, 2017	May 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Long-Term Debt	$ 705,096
Debt Issuance Costs	(24,192)
Long-Term Debt, Net	680,904	$ 70,700
Less: Current portion	(5,800)
Long-term debt	675,104		$ 0
Term Loan Facility [Member]
Debt Instrument [Line Items]
Long-Term Debt	387,800
Debt Issuance Costs	(12,957)
Long-Term Debt, Net	$ 374,843
Weighted Average Interest Rate	5.50%
Senior Notes [Member] | Senior Notes, 6.00%, due 2025 [Member]
Debt Instrument [Line Items]
Long-Term Debt	$ 294,166
Debt Issuance Costs	(7,919)
Long-Term Debt, Net	$ 286,247
Weighted Average Interest Rate	6.00%
Other [Member]
Debt Instrument [Line Items]
Long-Term Debt	$ 23,130
Debt Issuance Costs	(3,316)
Long-Term Debt, Net	$ 19,814
Weighted Average Interest Rate	1.00%

Debt - Summary of Long-Term D74

Debt - Summary of Long-Term Debt and Related Weighted Average Interest Rates (Parenthetical) (Detail)	Oct. 01, 2017
Senior Notes, 6.00%, due 2025 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Interest rate percentage	6.00%

Debt - Additional Information (

Debt - Additional Information (Detail)	Sep. 30, 2017	Jun. 15, 2017EUR (€)	Mar. 22, 2017USD ($)	Oct. 01, 2017USD ($)	Oct. 01, 2017EUR (€)	May 30, 2017USD ($)
Debt Instrument [Line Items]
Debt default, holder percent to declare all notes due, minimum				30.00%	30.00%
Long-term Debt				$ 680,904,000		$ 70,700,000
Current portion of long-term debt				5,800,000
Uniwheels Acquisition [Member]
Debt Instrument [Line Items]
Long-term Debt				23,100,000
Current portion of long-term debt				5,800,000
Senior Notes [Member] | Senior Notes, 6.00%, due 2025 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount | €		€ 250,000,000
Interest rate percentage		6.00%
Senior Notes [Member] | Senior Secured Term Loan Facility [Member]
Debt Instrument [Line Items]
Amount of term loan facility			$ 400,000,000
Repayments under term loan facility				1,000,000
Term loan facility balance				387,800,000
Outstanding borrowings				0
Amount outstanding				2,800,000
Amount of availability				$ 157,200,000
Senior Notes [Member] | Senior Secured Term Loan Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate spread percentage			1.00%
Senior Notes [Member] | Senior Secured Term Loan Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate spread percentage			4.50%
Senior Notes [Member] | Senior Secured Term Loan Facility [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Interest rate spread percentage			2.00%
Senior Notes [Member] | Senior Secured Term Loan Facility [Member] | Federal Funds Effective Swap Rate [Member]
Debt Instrument [Line Items]
Interest rate spread percentage			0.50%
Senior Notes [Member] | Senior Secured Term Loan Facility [Member] | One Month London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Interest rate spread percentage			1.00%
Senior Notes [Member] | Senior Secured Term Loan Facility [Member] | One Month LIBOR Plus Margin [Member]
Debt Instrument [Line Items]
Interest rate spread percentage			3.50%
Senior Notes [Member] | Debt Instrument Redemption Period One [Member] | Senior Notes, 6.00%, due 2025 [Member]
Debt Instrument [Line Items]
Redemption percentage		103.00%
Senior Notes [Member] | Debt Instrument Redemption Period Two [Member] | Senior Notes, 6.00%, due 2025 [Member]
Debt Instrument [Line Items]
Redemption percentage		101.50%		40.00%
Senior Notes [Member] | Debt Instrument Redemption Period Three [Member] | Senior Notes, 6.00%, due 2025 [Member]
Debt Instrument [Line Items]
Redemption percentage		100.00%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Commitment fees percentage			0.50%
Revolving Credit Facility [Member] | Uniwheels Acquisition [Member]
Debt Instrument [Line Items]
Amount of term loan facility | €					€ 30,000,000
Long-term Debt				$ 1,800,000
Debt instrument expiry date				Jul. 31, 2020
Revolving Credit Facility [Member] | Minimum [Member]
Debt Instrument [Line Items]
Commitment fees percentage	0.50%
Revolving Credit Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Commitment fees percentage	0.25%
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate spread percentage	3.50%		1.00%
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate spread percentage	3.00%		3.50%
Revolving Credit Facility [Member] | Base Rate [Member]
Debt Instrument [Line Items]
Interest rate spread percentage			2.00%
Revolving Credit Facility [Member] | Base Rate [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate spread percentage	2.50%
Revolving Credit Facility [Member] | Base Rate [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate spread percentage	2.00%
Revolving Credit Facility [Member] | Federal Funds Effective Swap Rate [Member]
Debt Instrument [Line Items]
Interest rate spread percentage			0.50%
Revolving Credit Facility [Member] | One Month London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate spread percentage			1.00%
Revolving Credit Facility [Member] | One Month London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest rate spread percentage			3.50%
Revolving Credit Facility [Member] | Euribor [Member] | Uniwheels Acquisition [Member]
Debt Instrument [Line Items]
Interest rate spread percentage				1.00%
Revolving Credit Facility [Member] | Euribor [Member] | Minimum [Member] | Uniwheels Acquisition [Member]
Debt Instrument [Line Items]
Interest rate spread percentage				0.96%
Revolving Credit Facility [Member] | Senior Secured Term Loan Facility [Member]
Debt Instrument [Line Items]
Amount of term loan facility			$ 160,000,000
Term Loan Facility [Member] | Senior Secured Term Loan Facility [Member]
Debt Instrument [Line Items]
Percentage of capital stock issued				65.00%	65.00%
Equipment Loan [Member] | Uniwheels Acquisition [Member]
Debt Instrument [Line Items]
Long-term Debt				$ 21,300,000
Equipment Loan [Member] | Euribor [Member] | Uniwheels Acquisition [Member]
Debt Instrument [Line Items]
Interest rate spread percentage				1.00%

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail)	9 Months Ended
	Oct. 01, 2017
Commitments and Contingencies Disclosure [Abstract]
Maximum length of time, foreign currency cash flow hedge	48 months

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Detail)	9 Months Ended
	Oct. 01, 2017USD ($)Categoryshares	Dec. 31, 2016USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorizes issuance of common stock	3,500,000
Number of shares available for grant	1,600,000
Maximum shares that may be used as full value awards	600,000
Amount of unrecognized compensation cost | $	$ 3,500,000
Weighted average period for recognition	1 year 9 months 18 days
Capitalized share based compensation cost | $	$ 0	$ 0
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Number of individual categories | Category	3
Performance Shares [Member] | Upon certain Return on Invested Capital targets for 2015 to 2017 units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	40.00%
Performance Shares [Member] | Upon certain Cumulative EPS targets for 2016 to 2017 units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	40.00%
Performance Shares [Member] | Upon certain EBITDA margin targets for 2015 units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	40.00%
Performance Shares [Member] | Upon certain market based Shareholder Return targets for 2015 to 2017 units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	20.00%
Employee Stock Option [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period	10 years
Restricted Stock [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years

Stock-Based Compensation - Summ

Stock-Based Compensation - Summary of Stock Option Activity (Detail) - USD ($)	9 Months Ended	12 Months Ended
	Oct. 01, 2017	Dec. 31, 2016
Number of Options Outstanding
Number of Options Outstanding, Beginning balance (in shares)	231,625
Granted (in shares)	0
Exercised (in shares)	(2,000)
Canceled (in shares)	(6,000)
Expired (in shares)	0
Number of Options Outstanding, Ending balance (in shares)	223,625	231,625
Options vested or expected to vest, Outstanding (in shares)	223,625
Exercisable, Outstanding (in shares)	223,625
Weighted Average Exercise Price
Weighted Average Exercise Price, Beginning balance (in dollars per share)	$ 18.88
Granted (in dollars per share)	0
Exercised (in dollars per share)	16.76
Canceled (in dollars per share)	21.09
Expired (in dollars per share)	0
Weighted Average Exercise Price, Ending balance (in dollars per share)	18.84	$ 18.88
Options vested or expected to vest, Weighted Average Exercise Price (in dollars per share)	18.84
Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 18.84
Option Outstanding, Remaining Contractual Life in Years		3 years 1 month 6 days
Options vested or expected to vest, Remaining Contractual Life in Years	1 year 7 months 6 days
Exercisable, , Remaining Contractual Life in Years	1 year 7 months 6 days
Options Outstanding, Aggregate Intrinsic Value		$ 1,845,263
Options vested or expected to vest, Aggregate Intrinsic Value	$ 51,478
Exercisable, Aggregate Intrinsic Value	$ 51,478

Stock-Based Compensation - Su79

Stock-Based Compensation - Summary of Restricted Stock Activity (Detail) - Restricted Stock [Member] - $ / shares	9 Months Ended	12 Months Ended
	Oct. 01, 2017	Dec. 31, 2016
Number of Awards
Number of Awards, Beginning balance (in shares)	144,295
Granted (in shares)	0
Vested (in shares)	(137,823)
Canceled (in shares)	(3,667)
Number of Awards, Ending balance (in shares)	2,805	144,295
Weighted Average Grant Date Fair Value
Weighted Average Grant Date Fair Value, Beginning balance (in dollars per share)	$ 19.43
Granted (in dollars per share)	0
Vested (in dollars per share)	19.43
Canceled (in dollars per share)	19.16
Weighted Average Grant Date Fair Value, Ending balance (in dollars per share)	$ 19.72	$ 19.43
Weighted Average Remaining Amortization Period (in Years)	2 months 12 days	6 months

Stock-Based Compensation - Su80

Stock-Based Compensation - Summary of Restricted Stock Unit Activity (Detail) - Restricted Stock Units (RSUs) [Member] - $ / shares	9 Months Ended	12 Months Ended
	Oct. 01, 2017	Dec. 31, 2016
Number of Awards
Number of Awards, Beginning balance (in shares)	127,567
Granted (in shares)	131,656
Vested (in shares)	(37,844)
Canceled (in shares)	(22,068)
Number of Awards, Ending balance (in shares)	199,311	127,567
Weighted Average Grant Date Fair Value
Weighted Average Grant Date Fair Value, Beginning balance (in dollars per share)	$ 22.03
Granted (in dollars per share)	22.24
Vested (in dollars per share)	23.72
Canceled (in dollars per share)	22.95
Weighted Average Grant Date Fair Value, Ending balance (in dollars per share)	$ 21.74	$ 22.03
Weighted Average Remaining Amortization Period (in Years)	1 year 8 months 12 days	1 year 8 months 12 days

Stock-Based Compensation - Su81

Stock-Based Compensation - Summary of Restricted Performance Stock Unit Activity (Detail) - Performance Shares [Member] - $ / shares	9 Months Ended	12 Months Ended
	Oct. 01, 2017	Dec. 31, 2016
Number of Awards
Number of Awards, Beginning balance (in shares)	227,193
Granted (in shares)	164,566
Vested (in shares)	0
Canceled (in shares)	(63,166)
Number of Awards, Ending balance (in shares)	328,593	227,193
Weighted Average Grant Date Fair Value
Weighted Average Grant Date Fair Value, Beginning balance (in dollars per share)	$ 21.72
Granted (in dollars per share)	22.39
Vested (in dollars per share)	0
Canceled (in dollars per share)	22.47
Weighted Average Grant Date Fair Value, Ending balance (in dollars per share)	$ 21.92	$ 21.72
Weighted Average Remaining Amortization Period (in Years)	1 year 10 months 25 days	1 year 7 months 6 days

Stock-Based Compensation - Su82

Stock-Based Compensation - Summary of Stock-based Compensation Expense (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 01, 2017	Sep. 25, 2016	Oct. 01, 2017	Sep. 25, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense before income taxes	$ (15)	$ 344	$ 972	$ 2,658
Income tax benefit	6	(123)	(358)	(771)
Total stock-based compensation expense after income taxes	(9)	221	614	1,887
Cost of Sales [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense before income taxes	85	6	134	364
Selling, General and Administrative Expenses [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation expense before income taxes	$ (100)	$ 338	$ 838	$ 2,294

Common Stock Repurchase Progr83

Common Stock Repurchase Programs - Additional Information (Detail) - USD ($)	3 Months Ended	9 Months Ended		12 Months Ended
	Mar. 27, 2016	Oct. 01, 2017	Sep. 25, 2016	Dec. 31, 2016	Dec. 27, 2015	Jan. 31, 2016	Oct. 14, 2014
Equity, Class of Treasury Stock [Line Items]
Cost of share repurchases		$ 5,014,000	$ 13,527,000
2014 Share Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Amount authorized to be repurchased							$ 30,000,000
Shares repurchased	585,970				1,056,954
Cost of share repurchases	$ 10,300,000				$ 19,600,000
2016 Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Amount authorized to be repurchased						$ 50,000,000
Shares repurchased		215,841		454,718
Cost of share repurchases		$ 5,000,000		$ 10,400,000

Subsequent Event - Additional I

Subsequent Event - Additional Information (Detail) $ in Millions	Oct. 20, 2017USD ($)	Oct. 20, 2017PLN / shares€ / shares	Oct. 20, 2017€ / shares	May 30, 2017
Subsequent Event [Line Items]
Exchange rate (dollar per polish zloty)				3.74193
Subsequent Event [Member] | Domination and Profit Loss Transfer Agreement [Member]
Subsequent Event [Line Items]
Share price per share | (per share)		PLN 264	€ 62.18
Exchange rate (dollar per polish zloty)		3.74193	3.74193
Aggregate equity purchase price of the Acquisition | $	$ 781
Guaranteed annual dividend for each share that is not tendered | € / shares		PLN 3.23