Commitments and Contingencies - Schedule of Future Minimum Payments for Obligations and Rent Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Sublease Income
Rent expense, net of sublease income	$ 7,400	$ 6,300	$ 2,800
Office Lease Obligations
Lease Commitments
2017	9,749
2018	10,134
2019	10,426
2020	9,415
2021	7,863
Thereafter	39,657
Total minimum lease payments	87,244
Sublease Income
2017	(1,494)
2018	(1,827)
2019	(1,668)
2020	(1,091)
2021	0
Thereafter	0
Total minimum lease payments	$ (6,080)