Schedule of Finite and Indefinite-lived Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012	Dec. 29, 2012
Goodwill [Line Items]
Amortization of Intangible Assets Excluding Acquisition Costs	$ 1,677	$ 1,486	$ 4,910	$ 4,415
Amortization of Intangible Assets	2,284	2,172	6,731	6,471
Amortization of loan acquisition costs	607	686	1,821	2,056
Total gross finite-lived intangible assets	76,433		76,433		68,687
Accumulated amortization	(23,233)		(23,233)		(16,524)
Total net finite-lived intangible assets	53,200		53,200		52,163
Total	76,700		76,700		75,663
Trade names
Goodwill [Line Items]
Tradenames (indefinite-lived)	23,500		23,500		23,500
Technology
Goodwill [Line Items]
Total gross finite-lived intangible assets	31,900		31,900		31,900
Customer relationships
Goodwill [Line Items]
Total gross finite-lived intangible assets	17,051		17,051		16,869
Loan acquisition costs
Goodwill [Line Items]
Total gross finite-lived intangible assets	19,472		19,472		19,472
Other intangibles, principally patents
Goodwill [Line Items]
Total gross finite-lived intangible assets	8,010		8,010		446
Interest Expense [Member]
Goodwill [Line Items]
Amortization of loan acquisition costs	$ 607	$ 686	$ 1,821	$ 2,056