CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $) In Thousands	Total	Common Stock	Treasury Stock	Shares Held Under Employee Participation Plan	Additional Paid-in Capital	Comprehensive Income	Accumulated Other Comprehensive Income	Accumulated Earnings
Balance at Dec. 31, 2010	$ 780,827	$ 528	$ (2,467)	$ (777)	$ 488,384		$ 50,759	$ 244,400
Balance (in shares) at Dec. 31, 2010		52,772
Increase (Decrease) in Stockholders' Equity
Net income	51,886					51,886		51,886
Change in fair value of available for sale securities, net of taxes	(791)					(791)	(791)
Foreign currency translation	20,398					20,398	20,398
Total comprehensive income						71,493
Stock-based compensation	2,899				2,899
Stock-based compensation (in shares)		168
Issuance of restricted shares, net of shares remitted	(1,807)		(1,807)
Issuance of restricted shares, net of shares remitted (in shares)		(42)
Exercise of stock options	783	2			781
Exercise of stock options (in shares)		40
Net tax benefit on exercise of stock options	1,617				1,617
Employee stock purchase plan	1,556				1,556
Employee stock purchase plan (in shares)		48
Balance at Jun. 30, 2011	$ 857,368	$ 530	$ (4,274)	$ (777)	$ 495,237		$ 70,366	$ 296,286
Balance (in shares) at Jun. 30, 2011		52,986