Condensed Consolidated Statements Of Equity (USD $) In Thousands	Total	Common stock	Additional paid-in capital	Retained deficit	Accumulated other comprehensive income	Noncontrolling interest
Balance at Dec. 31, 2010	$ 464,013	$ 1,329	$ 765,867	$ (349,612)	$ 42,035	$ 4,394
Balance (in shares) at Dec. 31, 2010		132,901
Shares issued under stock plans	5,656	22	5,634
Shares issued under stock plans, shares		2,161
Share-based compensation expense	5,784		5,784
Tax benefit associated with stock plans	398		398
Purchase of noncontrolling interest	(1,483)		2,969		562	(5,014)
Pension liability adjustment, net of tax	2,444				2,444
Reclassification of cumulative translation adjustment associated with sale of equity method investee	(1,715)				(1,715)
Foreign currency translation	2,026				1,806	220
Net income	84,085			83,685		400
Balance at Oct. 01, 2011	561,208	1,351	780,652	(265,927)	45,132
Balance (in shares) at Oct. 01, 2011		135,062
Balance at Dec. 31, 2011	608,238	1,358	788,673	(225,766)	43,973
Balance (in shares) at Dec. 31, 2011		135,821
Shares issued under stock plans	4,689	18	4,671
Shares issued under stock plans, shares		1,743
Share-based compensation expense	8,030		8,030
Repurchase and retirement of common stock	(427)	(1)	(329)	(97)
Repurchase and retirement of common stock, shares		(57)
Tax benefit associated with stock plans	1,337		1,337
Pension liability adjustment, net of tax	8				8
Reclassification of foreign currency translation associated with acquisition of business	(216)				(216)
Foreign currency translation	3,729				3,729
Net income	57,569			57,569
Balance at Sep. 29, 2012	$ 682,957	$ 1,375	$ 802,382	$ (168,294)	$ 47,494
Balance (in shares) at Sep. 29, 2012		137,507