Commitments - Future Minimum Lease Payments (Details) $ in Thousands	Dec. 31, 2016 USD ($)
Capital Leases
2017	$ 630
2018	580
2019	429
2020	10
Total minimum lease payments	1,649
Less amount representing interest	(200)
Present value of obligations under capital leases	1,449
Less current portion	(512)
Long-term capital lease obligations	937
Operating Leases
2017	12,273
2018	9,398
2019	9,048
2020	8,662
2021	7,131
Thereafter	11,362
Total minimum lease payments	$ 57,874