Guarantor Financial Information (Condensed Consolidated Statements of Cash Flows) (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2017	Apr. 02, 2016
Cash flows from operating activities:
Net income	$ 7,398	$ 2,663
Earnings in investments in subsidiaries	0	0
Other operating cash flows	87,071	42,380
Net cash provided by operating activities	94,469	45,043
Cash flows from investing activities:
Capital expenditures	(62,292)	(53,375)
Acquisitions, net of cash acquired	0	(8,511)
Investment in subsidiaries and affiliates	(2,250)	0
Note receivable from affiliates		0
Gross proceeds from disposal of property, plant and equipment and other assets	1,340	1,424
Proceeds from insurance settlement	3,301	1,181
Net cash used by investing activities	(59,901)	(59,281)
Cash flows from financing activities:
Proceeds from long-term debt	8,649	8,760
Payments on long-term debt	(9,265)	(16,207)
Borrowings from revolving credit facility	47,000	33,000
Payments on revolving credit facility	(52,327)	(21,000)
Net cash overdraft financing	(1,077)	0
Borrowings from affiliates		0
Deferred loan costs	(1,135)	0
Issuance of common stock	22	45
Repurchase of treasury stock	0	(5,000)
Minimum withholding taxes paid on stock awards	(1,995)	(1,788)
Excess tax benefits from stock-based compensation	0	(446)
Distributions to noncontrolling interests	(433)	0
Net cash used by financing activities	(10,561)	(2,636)
Effect of exchange rate changes on cash	309	7,316
Net increase/(decrease) in cash and cash equivalents	24,316	(9,558)
Cash and cash equivalents at beginning of period	114,564	156,884
Cash and cash equivalents at end of period	138,880	147,326
Parent [Member]
Cash flows from operating activities:
Net income	7,398	2,663
Earnings in investments in subsidiaries	(38,318)	(28,971)
Other operating cash flows	56,236	34,573
Net cash provided by operating activities	25,316	8,265
Cash flows from investing activities:
Capital expenditures	(18,732)	(11,065)
Acquisitions, net of cash acquired		0
Investment in subsidiaries and affiliates	(2,250)
Note receivable from affiliates		0
Gross proceeds from disposal of property, plant and equipment and other assets	304	945
Proceeds from insurance settlement	0	0
Net cash used by investing activities	(20,678)	(10,120)
Cash flows from financing activities:
Proceeds from long-term debt	0	0
Payments on long-term debt	(1,522)	(5,291)
Borrowings from revolving credit facility	47,000	33,000
Payments on revolving credit facility	(47,000)	(21,000)
Net cash overdraft financing	0
Borrowings from affiliates		0
Deferred loan costs	(1,135)
Issuance of common stock	22	45
Repurchase of treasury stock		(5,000)
Minimum withholding taxes paid on stock awards	(1,981)	(1,663)
Excess tax benefits from stock-based compensation		(446)
Distributions to noncontrolling interests	0
Net cash used by financing activities	(4,616)	(355)
Effect of exchange rate changes on cash	0	0
Net increase/(decrease) in cash and cash equivalents	22	(2,210)
Cash and cash equivalents at beginning of period	1,470	3,443
Cash and cash equivalents at end of period	1,492	1,233
Guarantors [Member]
Cash flows from operating activities:
Net income	25,551	18,841
Earnings in investments in subsidiaries	0	0
Other operating cash flows	(9,676)	(4,953)
Net cash provided by operating activities	15,875	13,888
Cash flows from investing activities:
Capital expenditures	(19,689)	(21,764)
Acquisitions, net of cash acquired		0
Investment in subsidiaries and affiliates	0
Note receivable from affiliates		0
Gross proceeds from disposal of property, plant and equipment and other assets	608	0
Proceeds from insurance settlement	0	0
Net cash used by investing activities	(19,081)	(21,764)
Cash flows from financing activities:
Proceeds from long-term debt	0	0
Payments on long-term debt	0	0
Borrowings from revolving credit facility	0	0
Payments on revolving credit facility	0	0
Net cash overdraft financing	0
Borrowings from affiliates		5,963
Deferred loan costs	0
Issuance of common stock	0	0
Repurchase of treasury stock		0
Minimum withholding taxes paid on stock awards	0	0
Excess tax benefits from stock-based compensation		0
Distributions to noncontrolling interests	0
Net cash used by financing activities	0	5,963
Effect of exchange rate changes on cash	0	0
Net increase/(decrease) in cash and cash equivalents	(3,206)	(1,913)
Cash and cash equivalents at beginning of period	5,754	3,993
Cash and cash equivalents at end of period	2,548	2,080
Non-guarantors [Member]
Cash flows from operating activities:
Net income	12,767	10,130
Earnings in investments in subsidiaries	0	0
Other operating cash flows	40,511	12,760
Net cash provided by operating activities	53,278	22,890
Cash flows from investing activities:
Capital expenditures	(23,871)	(20,546)
Acquisitions, net of cash acquired		(8,511)
Investment in subsidiaries and affiliates	0
Note receivable from affiliates		(5,963)
Gross proceeds from disposal of property, plant and equipment and other assets	428	479
Proceeds from insurance settlement	3,301	1,181
Net cash used by investing activities	(20,142)	(33,360)
Cash flows from financing activities:
Proceeds from long-term debt	8,649	8,760
Payments on long-term debt	(7,743)	(10,916)
Borrowings from revolving credit facility	0	0
Payments on revolving credit facility	(5,327)	0
Net cash overdraft financing	(1,077)
Borrowings from affiliates		0
Deferred loan costs	0
Issuance of common stock	0	0
Repurchase of treasury stock		0
Minimum withholding taxes paid on stock awards	(14)	(125)
Excess tax benefits from stock-based compensation		0
Distributions to noncontrolling interests	(433)
Net cash used by financing activities	(5,945)	(2,281)
Effect of exchange rate changes on cash	309	7,316
Net increase/(decrease) in cash and cash equivalents	27,500	(5,435)
Cash and cash equivalents at beginning of period	107,340	149,448
Cash and cash equivalents at end of period	134,840	144,013
Eliminations [Member]
Cash flows from operating activities:
Net income	(38,318)	(28,971)
Earnings in investments in subsidiaries	38,318	28,971
Other operating cash flows	0	0
Net cash provided by operating activities	0	0
Cash flows from investing activities:
Capital expenditures	0	0
Acquisitions, net of cash acquired		0
Investment in subsidiaries and affiliates	0
Note receivable from affiliates		5,963
Gross proceeds from disposal of property, plant and equipment and other assets	0	0
Proceeds from insurance settlement	0	0
Net cash used by investing activities	0	5,963
Cash flows from financing activities:
Proceeds from long-term debt	0	0
Payments on long-term debt	0	0
Borrowings from revolving credit facility	0	0
Payments on revolving credit facility	0	0
Net cash overdraft financing	0
Borrowings from affiliates		(5,963)
Deferred loan costs	0
Issuance of common stock	0	0
Repurchase of treasury stock		0
Minimum withholding taxes paid on stock awards	0	0
Excess tax benefits from stock-based compensation		0
Distributions to noncontrolling interests	0
Net cash used by financing activities	0	(5,963)
Effect of exchange rate changes on cash	0	0
Net increase/(decrease) in cash and cash equivalents	0	0
Cash and cash equivalents at beginning of period	0	0
Cash and cash equivalents at end of period	$ 0	$ 0