Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 28, 2015	Mar. 29, 2014
Operating activities:
Net income	$ 14,872us-gaap_NetIncomeLoss	$ 14,312us-gaap_NetIncomeLoss
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation	13,319us-gaap_Depreciation	7,832us-gaap_Depreciation
Amortization	12,307us-gaap_AmortizationOfIntangibleAssets	2,336us-gaap_AmortizationOfIntangibleAssets
Share-based compensation expense	2,258us-gaap_ShareBasedCompensation	1,877us-gaap_ShareBasedCompensation
Provision for deferred income taxes	(2,833)us-gaap_DeferredIncomeTaxExpenseBenefit	330us-gaap_DeferredIncomeTaxExpenseBenefit
Other	2,908us-gaap_OtherNoncashIncomeExpense	513us-gaap_OtherNoncashIncomeExpense
Changes in operating assets and liabilities:
Trade accounts and notes receivable	(32,246)	(7,217)
Inventories	(7,512)us-gaap_IncreaseDecreaseInInventories	(7,545)us-gaap_IncreaseDecreaseInInventories
Accounts payable and accrued liabilities	(5,962)	(3,554)
Other current assets	3,100	827
Income taxes payable and refundable income taxes	3,241	2,012
Other	(3,584)	689
Net cash (used in) provided by operating activities	(132)	12,412
Investing activities:
Acquisition of property, plant and equipment	(20,488)	(13,780)
Proceeds from maturities of short-term investments	741	0
Other	319	395
Net cash used in investing activities	(19,428)	(13,385)
Financing activities:
Payments of long-term debt	(25,000)us-gaap_RepaymentsOfLongTermDebt	0us-gaap_RepaymentsOfLongTermDebt
Issuance of common stock	520	0
Taxes paid related to net share settlement of equity awards	(2,053)	(1,989)
Other	135	244
Net cash used in financing activities	(26,398)	(1,745)
Effect of exchange rate changes on cash and cash equivalents	(2,354)	(47)
Decrease in cash and cash equivalents	(48,312)	(2,765)
Cash and cash equivalents at beginning of period	389,699	384,426
Cash and cash equivalents at end of period	$ 341,387	$ 381,661

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.