Consolidated Statement of Stockholders' Equity (USD $) In Thousands, except Share data	Total	Equity of the Company Preferred Stock [Member]	Equity of the Company Common Stock [Member]	Equity of the Company Treasury Stock [Member]	Equity of the Company Additional Paid-in Capital [Member]	Equity of the Company Accumulated Other Comprehensive Income (Loss) [Member]	Equity of the Company Retained Earnings [Member]	Noncontrolling Interest [Member]
Beginning balance,value at Dec. 31, 2010	$ 454,818	$ 0	$ 579	$ (322,946)	$ 349,157	$ 20,334	$ 396,602	$ 11,092
Preferred stock beginning balance, share at Dec. 31, 2010	0	0
Common stock beginning balance, share at Dec. 31, 2010	57,875,269		57,875,000
Net income	61,030						58,061	2,969
Dividends distributed to noncontrolling interest	(2,783)							(2,783)
Foreign currency translation adjustments	(9,731)					(9,366)		(365)
Derivatives valuation, net of tax	(10,414)					(10,414)
Vesting of restricted stock units issued out of treasury, share			452,000
Vesting of restricted stock units issued out of treasury, value	(4,767)		4	6,187	(10,958)
Exercise of stock options, share			1,036,000
Exercise of stock options, value	8,528		10	14,281	(5,763)
Excess tax benefit from equity-based awards	4,520				4,520
Equity-based compensation expense	11,563				11,563
Purchases of common stock, share			(3,026,000)
Purchases of common stock, value	(58,367)		(30)	(58,337)
Other	334					334
Ending balance,value at Sep. 30, 2011	$ 454,731	$ 0	$ 563	$ (360,815)	$ 348,519	$ 888	$ 454,663	$ 10,913
Preferred stock ending balance, share at Sep. 30, 2011	0	0
Common stock ending balance, share at Sep. 30, 2011	56,336,610		56,337,000