Commitments and Contingencies - Facility Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Schedule of Facility Leases [Line Items]
2015	$ 31,176
2016	31,913
2017	32,667
2018	33,442
2019	34,234
Thereafter	308,935
Total	472,367
Facility lease obligations [Abstract]
Interest expense in connection with facility lease obligation	9,700	$ 14,500	$ 16,200
Commitments under facility leases [Abstract]
Facility lease obligation, including reimbursements	364,708	312,292
Facilities - Buildings A and B
Schedule of Facility Leases [Line Items]
2015	13,809
2016	14,079
2017	14,356
2018	14,640
2019	14,931
Thereafter	117,096
Total	$ 188,911
Facility lease obligations [Abstract]
Imputed interest rate applicable to facility lease obligation	11.00%
Commitments under facility leases [Abstract]
Facility lease obligation, including reimbursements	$ 108,857	110,210
Facilities - Building C
Schedule of Facility Leases [Line Items]
2015	4,688
2016	4,818
2017	4,951
2018	5,088
2019	5,227
Thereafter	54,760
Total	$ 79,532
Facility lease obligations [Abstract]
Imputed interest rate applicable to facility lease obligation	10.00%
Commitments under facility leases [Abstract]
Facility lease obligation, including reimbursements	$ 49,475	49,312
Facilities Building D and E
Schedule of Facility Leases [Line Items]
2015	12,679
2016	13,016
2017	13,360
2018	13,714
2019	14,076
Thereafter	137,079
Total	$ 203,924
Facility lease obligations [Abstract]
Imputed interest rate applicable to facility lease obligation	7.00%
Commitments under facility leases [Abstract]
Facility lease obligation, including reimbursements	$ 206,376	$ 152,770