Commitments and Contingencies (Future Minimum Lease Commitments) (Details) $ in Thousands	Dec. 31, 2016 USD ($)
Operating and Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] [Abstract]
Sublease income netted with future minimum lease commitments	$ 1,800
2017	7,710
2018	8,117
2019	8,686
2020	8,951
2021	9,192
Thereafter	42,411
Total	$ 85,067