Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 29, 2014	Mar. 30, 2013
Operating activities:
Net income	$ 14,312	$ 16,397
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	7,832	7,296
Amortization	2,336	2,287
Share-based compensation expense	1,877	1,688
Other	843	2,043
Changes in operating assets and liabilities:
Trade accounts receivable and notes receivable	(7,217)	(12,893)
Inventories	(7,545)	(3,758)
Accounts payable and accrued liabilities	(3,554)	(7,015)
Other current assets	827	1,970
Income taxes payable and refundable income taxes	2,012	318
Other	689	(898)
Net cash provided by operating activities	12,412	7,435
Investing activities:
Acquisition of property, plant and equipment	(13,780)	(16,140)
Proceeds from maturities of short-term investments	0	20,000
Other	395	12
Net cash (used in) provided by investing activities	(13,385)	3,872
Financing activities:
Issuance of common stock	0	4,873
Taxes paid related to net share settlement of equity awards	(1,989)	0
Repurchase and retirement of common stock	0	(3,777)
Other	244	741
Net cash (used in) provided by financing activities	(1,745)	1,837
Effect of exchange rate changes on cash and cash equivalents	(47)	(4,717)
(Decrease) increase in cash and cash equivalents	(2,765)	8,427
Cash and cash equivalents at beginning of period	384,426	330,419
Cash and cash equivalents at end of period	381,661	338,846
Equipment purchases in accounts payable	3,465	4,149
Debt Issuance Costs in other accrued liabilities	$ 4,242	$ 0