Condensed Consolidated Statements Of Equity (USD $) In Thousands	Total	Common stock	Additional paid-in capital	Retained deficit	Foreign currency translation adjustments	Defined benefit pension adjustments
Balance at Dec. 31, 2011	$ 608,238	$ 1,358	$ 788,673	$ (225,766)	$ 44,737	$ (764)
Balance (in shares) at Dec. 31, 2011		135,821
Shares issued under stock plans (in shares)		1,649
Shares issued under stock plans	4,194	17	4,177	0	0	0
Repurchase and retirement of common stock (shares)		(57)
Repurchase and retirement of common stock	(427)	(1)	(329)	(97)	0	0
Share-based compensation expense	3,934	0	3,934	0	0	0
Tax benefit associated with stock plans	827	0	827	0	0	0
Pension liability adjustments, net of tax	15	0	0	0	0	15
Reclassification of foreign currency translation associated with acquisition of business	(216)	0	0	0	(216)	0
Foreign currency translation	(4,141)	0	0	0	(4,141)	0
Net income	39,532	0	0	39,532	0	0
Balance at Jun. 30, 2012	651,956	1,374	797,282	(186,331)	40,380	(749)
Balance (in shares) at Jun. 30, 2012		137,413
Balance at Dec. 31, 2012	694,799	1,385	809,514	(157,038)	41,997	(1,059)
Balance (in shares) at Dec. 31, 2012		138,458
Shares issued under stock plans (in shares)		1,687
Shares issued under stock plans	6,322	17	6,305	0	0	0
Repurchase and retirement of common stock (shares)		(970)
Repurchase and retirement of common stock	(9,382)	(10)	(5,663)	(3,709)	0	0
Share-based compensation expense	3,769	0	3,769	0	0	0
Tax benefit associated with stock plans	940	0	940	0	0	0
Pension liability adjustments, net of tax	57	0	0	0	0	57
Foreign currency translation	(16,420)	0	0	0	(16,420)	0
Net income	36,178	0	0	36,178		0
Balance at Jun. 29, 2013	$ 716,263	$ 1,392	$ 814,865	$ (124,569)	$ 25,577	$ (1,002)
Balance (in shares) at Jun. 29, 2013		139,175