Income Taxes - Components of Income Tax (Benefit) Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Federal current	$ 0	$ 0	$ (260)
Federal deferred	(19,975)	(23,040)	(21,679)
State current	72	361	1,312
State deferred	(705)	(3,959)	(1,530)
Foreign current	2,149	(1,898)	3,242
Foreign deferred	(3,162)	7,905	(4,227)
Income Tax Expense (Benefit)	$ (21,621)	$ (20,631)	$ (23,142)