Commitments and Contingencies (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Lease Commitments
Rental expense under operating leases	$ 2,800	$ 3,700	$ 4,000
Future minimum lease commitments on non-cancelable operating leases
2016	2,319
2017	1,198
2018	326
2019	98
2020	73
Total	4,014
Cash payment schedule associated with lease obligation
2016	4,815
2017	5,315
2018	5,471
2019	5,594
2020	5,719
Thereafter	103,847
Total lease payments	130,761
Less interest portion	(83,175)
Sales leaseback obligation	47,586
Purchase Commitments
Non-cancelable contracts and purchase orders for inventory	$ 35,800