Condensed Consolidated Statement of Equity (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	Noncontrolling Interests [Member]
Beginning Balance at Dec. 31, 2012	$ 1,170,946	$ 1	$ 866,720	$ 318,094	$ (15,514)	$ 1,645
Beginning Balance, Shares at Dec. 31, 2012		97,698,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income/(loss)	77,119			77,119		(26)
Net Income Sse	77,093
Shares issued in connection with share-based compensation (shares)		787,000
Shares issued in connection with share-based compensation (value)	7,119		7,119
Tax withholdings related to net share settlements of restricted stock units	(6,680)		(6,680)
Share-based compensation	16,933		16,933
Shares repurchased and retired (shares)		(2,881,000)
Shares repurchased and retired (value)	(75,676)		(75,676)
Sale Of Subsidiary Shares To Noncontrolling Interests	(1,619)					(1,619)
Other comprehensive income	(38,472)				(38,472)
Ending Balance at Jun. 30, 2013	$ 1,149,644	$ 1	$ 808,416	$ 395,213	$ (53,986)	$ 0
Ending Balance, Shares at Jun. 30, 2013		95,604,000