Reconciliation of Total Segment Profit to Operating Income (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
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Profit	$ 35,680	$ 46,049	$ 109,144	$ 135,924
Amortization of intangible assets	(2,343)	(2,389)	(6,989)	(7,259)
Contingent consideration fair value adjustment	1,813	0	1,813	0
Unallocated General And Administrative Expenses	(11,241)	(16,526)	(33,425)	(43,163)
Operating income	23,909	27,134	70,543	85,502
Other expense (income), net	963	1,441	(1,295)	636
Income before income taxes and equity in net income of affiliates	$ 22,946	$ 25,693	$ 71,838	$ 84,866