Commitments and Contingencies - Leases (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Mar. 31, 2015 ft²
Operating Leased Assets [Line Items]
Rent expense	$ 4,827	$ 4,639	$ 4,149
Deferred rent balance	820	749
Deferred rent, included in other long-term liabilities	619	$ 692
Deposits for lines of credit to secure obligations under the leases	1,052
Minimum Operating Lease Payments
2017	4,715
2018	3,031
2019	2,633
2020	1,741
2021 and thereafter	109
Total	$ 12,229
Long Beach office lease
Operating Leased Assets [Line Items]
Increase in lease area | ft²				7,949