Commitments and Contingencies (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Incentive from Lessor	$ 2,000
Deferred rent credit	1,700
Operating leases
Total	18,444
2018	3,679
2019	4,710
2020	4,699
2021	4,595
2022	761
More than 5 years	0
Purchase commitments
Total	3,244
2018	462
2019	718
2020	688
2021	688
2022	688
More than 5 years	0
Capital leases
Total	101
2018	63
2019	14
2020	10
2021	10
2022	4
More than 5 years	0
Debt and Interest Related Payments
Total	18,413
2018	1,431
2019	6,068
2020	5,620
2021	5,294
2022	0
More than 5 years	0
Total
Total	40,202
2018	5,635
2019	11,510
2020	11,017
2021	10,587
2022	1,453
More than 5 years	0
Rent expense	$ 1,500	$ 1,300