Consolidated Statements of Stockholders' Equity and Redeemable Non-controlling Interest (Unaudited) (USD $) In Thousands	Total	Redeemable Non-controlling Interest	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income	Retained Earnings	Treasury Stock
Beginning Balance at Jan. 01, 2011	$ 972,606		$ 517	$ 674,508	$ 43,048	$ 501,394	$ (246,861)
Net income	44,031					44,031
Other comprehensive income	26,570				26,570
Stock issued in connection with stock compensation plans	5,818		3	5,815
Compensation expense in connection with employee stock compensation plans	11,347			11,347
Purchase of treasury stock related to stock compensation plans	(1,996)						(1,996)
Repurchases of common stock	(29,150)						(29,150)
Ending Balance at Apr. 02, 2011	1,029,226		520	691,670	69,618	545,425	(278,007)
Beginning Balance at Dec. 31, 2011	897,200	15,200	522	721,356	16,242	625,760	(466,680)
Net income	35,916	39				35,916
Other comprehensive income	17,937	610			17,937
Tax benefit related to exercise of equity awards	6,993			6,993
Stock issued in connection with stock compensation plans	13,132		7	13,125
Compensation expense in connection with employee stock compensation plans	5,423			5,423
Purchase of treasury stock related to stock compensation plans	(5,625)						(5,625)
Ending Balance at Mar. 31, 2012	$ 970,976	$ 15,849	$ 529	$ 746,897	$ 34,179	$ 661,676	$ (472,305)