Liabilities (Details 2) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Reconciliation of the restructuring liability
Balance at the beginning of the period			$ 1,428
Provision	$ 469	$ 2,317	3,509	$ 3,510
Payments			(4,219)
Balance at the end of the period	718		718
Customer Deposits and Deferred Revenue
Customer deposits	32,400		32,400		$ 73,000
Personnel severance and related costs
Reconciliation of the restructuring liability
Balance at the beginning of the period			1,428
Provision			2,421
Payments			(3,377)
Balance at the end of the period	472		472
Facility Closing Costs
Reconciliation of the restructuring liability
Provision			1,088
Payments			(842)
Balance at the end of the period	$ 246		$ 246