Income Taxes (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current:
United States - Federal	$ 33,748	$ 0	$ 0
United States - State	980	0	0
France	1,657	1,400	76
Total current	36,385	1,400	76
Deferred:
United States - Federal	1,830	(2,457)	(9,905)
United States - State	1,267	(350)	(1,415)
France	(1,747)	0	0
Total deferred	1,350	(2,807)	(11,320)
Income tax provision (benefit)	$ 37,735	$ (1,407)	$ (11,244)