Income Taxes (Components of income tax expense and income before taxes, by jurisdiction) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Geographic sources of income (loss) before income taxes
United States	$ (39,684)	$ 16,571	$ (36,829)
Foreign	107,219	119,507	160,816
Income before taxes and equity in earnings of unconsolidated affiliate	67,535	136,078	123,987
Components of the provision (benefit) for income taxes
Current federal tax expense (benefit)	0	0	0
Current state tax expense (benefit)	11	(46)	0
Current foreign tax expense (benefit)	28,721	51,081	30,902
Current income tax expense (benefit)	28,732	51,035	30,902
Deferred federal tax expense (benefit)	0	0	(8,556)
Deferred state tax expense (benefit)	0	0	9
Deferred foreign tax expense (benefit)	(697)	(17,190)	291
Deferred income tax expense (benefit)	(697)	(17,190)	(8,256)
Income tax expense	$ 28,035	$ 33,845	$ 22,646