Reconciliation of Total Segment Profit to Operating Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013	Jun. 30, 2012
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Profit	$ 39,845	$ 47,610	$ 73,464	$ 89,875
Unallocated General And Administrative Expenses	(11,099)	(13,579)	(22,184)	(26,637)
Amortization of intangible assets	(2,359)	(2,420)	(4,646)	(4,870)
Operating income	26,387	31,611	46,634	58,368
Other income, net	(910)	(641)	(2,258)	(805)
Income before income taxes and equity in net income of affiliates	$ 27,297	$ 32,252	$ 48,892	$ 59,173