Financial Statements of Guarantors (Details 4) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2013	Mar. 31, 2012
Operating activities:
Net cash provided by (used in) operating activities	$ 36,186	$ 30,216
Investing activities:
Purchases of property, plant and equipment, net	(6,228)	(45,350)
Net cash used in investing activities	(6,228)	(45,350)
Financing activities:
Principal payments on debt	(7,500)	(924)
Payments on revolving credit facility	(25,000)
Proceeds from stock option exercises	202	284
Repurchases of common stock	(476)
Noncontrolling interest	869	(31)
Net cash used in financing activities	(31,905)	(671)
Effect of exchange rate changes on cash and cash equivalents	273	2,187
Net decrease in cash and cash equivalents	(1,674)	(13,618)
Cash and cash equivalents at beginning of period	44,873	92,574
Cash and cash equivalents at end of period	43,199	78,956
Combined Guarantor Subsidiaries
Operating activities:
Net cash provided by (used in) operating activities	14,072	26,400
Investing activities:
Purchases of property, plant and equipment, net	(2,261)	(38,689)
Net cash used in investing activities	(2,261)	(38,689)
Financing activities:
Intercompany transactions, net	(11,811)	12,289
Net cash used in financing activities	(11,811)	12,289
Combined Non-Guarantor Subsidiaries
Operating activities:
Net cash provided by (used in) operating activities	23,661	6,121
Investing activities:
Purchases of property, plant and equipment, net	(3,967)	(6,661)
Net cash used in investing activities	(3,967)	(6,661)
Financing activities:
Principal payments on debt		(117)
Intercompany transactions, net	(18,729)	8,774
Net cash used in financing activities	(18,729)	8,657
Effect of exchange rate changes on cash and cash equivalents	273	2,187
Net decrease in cash and cash equivalents	1,238	10,304
Cash and cash equivalents at beginning of period	28,098	65,495
Cash and cash equivalents at end of period	29,336	75,799
The Company
Operating activities:
Net cash provided by (used in) operating activities	(3,730)	(2,565)
Financing activities:
Principal payments on debt	(7,500)	(807)
Payments on revolving credit facility	(25,000)
Proceeds from stock option exercises	202	284
Repurchases of common stock	(476)
Noncontrolling interest	869	(31)
Intercompany transactions, net	32,723	(20,803)
Net cash used in financing activities	818	(21,357)
Net decrease in cash and cash equivalents	(2,912)	(23,922)
Cash and cash equivalents at beginning of period	16,775	27,079
Cash and cash equivalents at end of period	13,863	3,157
Eliminations
Operating activities:
Net cash provided by (used in) operating activities	2,183	260
Financing activities:
Intercompany transactions, net	(2,183)	(260)
Net cash used in financing activities	$ (2,183)	$ (260)