Income Taxes - Components of Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current
Federal	$ 0	$ 237	$ (1,803)
State	324	197	(316)
Foreign	5,021	4,071	2,216
Total current income tax expense	5,345	4,505	97
Deferred
Federal	3,811	87	2,824
State	499	3	449
Foreign	3,010	(2,282)	(3,926)
Total deferred income tax expense (benefit)	7,320	(2,192)	(653)
Prior year provision to return adjustment	$ 12,665	$ 2,313	$ (556)