Condensed consolidated statements of cash flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2013	Mar. 31, 2012
Operating activities:
Net income	$ 9,021	$ 18,773
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation expense	11,361	9,441
Amortization expense	2,964	4,091
Amortization of loan acquisition costs	618	617
Stock-based compensation	4,467	4,270
Loss on disposal of property, plant and equipment	2	289
Foreign currency loss	555	1,128
Deferred income taxes	(2,841)	4,115
Changes in operating assets and liabilities:
Accounts receivable	12,382	15,510
Inventories	(5,865)	(15,384)
Prepaid and other current assets	333	575
Accounts payable and accrued liabilities	2,188	(10,470)
Income taxes payable	203	(2,345)
Other, net	798	(394)
Net cash provided by 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