Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
Mar. 29, 2015	Mar. 30, 2014
Income Statement [Abstract]
Revenues	$ 546,957us-gaap_SalesRevenueGoodsNet	$ 487,690us-gaap_SalesRevenueGoodsNet
Cost of sales	(339,308)us-gaap_CostOfGoodsSold	(311,973)us-gaap_CostOfGoodsSold
Gross profit	207,649us-gaap_GrossProfit	175,717us-gaap_GrossProfit
Selling, general and administrative expenses	(140,816)	(94,848)
Research and development	(36,199)us-gaap_ResearchAndDevelopmentExpense	(20,571)us-gaap_ResearchAndDevelopmentExpense
Amortization of intangibles	(26,504)us-gaap_AmortizationOfIntangibleAssets	(11,741)us-gaap_AmortizationOfIntangibleAssets
Income from equity method investment	768	954
Operating income	4,898us-gaap_OperatingIncomeLoss	49,511us-gaap_OperatingIncomeLoss
Interest expense	(23,926)us-gaap_InterestExpense	(18,820)us-gaap_InterestExpense
Interest income	80us-gaap_InvestmentIncomeInterest	150us-gaap_InvestmentIncomeInterest
Income (loss) from continuing operations before taxes	(18,948)	30,841
Income tax expense	(688)us-gaap_IncomeTaxExpenseBenefit	(5,685)us-gaap_IncomeTaxExpenseBenefit
Income (loss) from continuing operations	(19,636)	25,156
Loss from disposal of discontinued operations, net of tax		(562)
Net income (loss)	(19,636)us-gaap_NetIncomeLoss	24,594us-gaap_NetIncomeLoss
Weighted average number of common shares and equivalents:
Basic	42,535	43,514
Diluted	42,535	44,293
Basic income (loss) per share
Continuing operations	$ (0.46)	$ 0.58
Discontinued operations		$ (0.01)
Net income (loss)	$ (0.46)us-gaap_EarningsPerShareBasic	$ 0.57us-gaap_EarningsPerShareBasic
Diluted income (loss) per share
Continuing operations	$ (0.46)	$ 0.57
Discontinued operations		$ (0.01)
Net income (loss)	$ (0.46)us-gaap_EarningsPerShareDiluted	$ 0.56us-gaap_EarningsPerShareDiluted
Comprehensive income (loss)	$ (5,723)us-gaap_ComprehensiveIncomeNetOfTax	$ 13,281us-gaap_ComprehensiveIncomeNetOfTax
Dividends declared per share	$ 0.05	$ 0.05

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.

Name:	us-gaap_AmortizationOfIntangibleAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration