Commitments and Contingencies - Future Minimum Lease Payments Under Operating and Capital Leases (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Commitments And Contingencies Disclosure [Abstract]
Operating leases, 2017	$ 3,096
Operating leases, 2018	3,029
Operating leases, 2019	2,900
Operating leases, 2020	2,984
Operating leases, 2021	3,069
Operating leases, Thereafter	16,603
Operating leases, Total minimum lease payments	31,681
Capital leases, 2017	1,330
Capital leases, 2018	1,038
Capital leases, 2019	574
Capital leases, 2020	261
Capital leases, Total minimum lease payments	3,203
Less: Portion representing interest	(375)
Present value of capital lease obligations	2,828
Less: Current portion of capital lease obligations	(1,130)	$ (1,190)
Capital lease obligations, net of current portion	$ 1,698	$ 2,526