Income Taxes (Components of income tax expense and income before taxes, by jurisdiction) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Geographic sources of income (loss) before income taxes
United States	$ 17,062	$ (8,097)	$ (22,039)
Foreign	42,641	108,316	273,198
Income before income taxes	59,703	100,219	251,159
Components of the provision (benefit) for income taxes
Current federal tax expense	0	0	10
Current state tax (benefit) expense	(75)	377	0
Current foreign tax expense	10,998	8,986	14,266
Current income tax expense	10,923	9,363	14,276
Deferred federal tax expense	1,859	2,356	2,098
Deferred state tax expense	266	337	300
Deferred foreign tax expense (benefit)	3,953	(4,932)	2,338
Deferred income tax expense (benefit)	6,078	(2,239)	4,736
Income tax expense	$ 17,001	$ 7,124	$ 19,012