Income Taxes - Income Tax Provision (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current:
United States - Federal	$ 30,738	$ 33,289	$ 0
United States - State	1,081	970	0
France	5,267	1,657	1,400
Total current	37,086	35,916	1,400
Deferred:
United States - Federal	(6,443)	504	(1,713)
United States - State	(23)	1,234	(331)
France	938	(1,747)	0
Total deferred	(5,528)	(9)	(2,044)
Income tax provision (benefit)	$ 31,558	$ 35,907	$ (644)