Commitments and Contingencies - Operating Leases (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) building	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Operating Leased Assets [Line Items]
Rent Charges for Utilities, Real Estate Taxes, and Operating Expense	$ 15,500	$ 13,600	$ 11,500
Operating Leases [Abstract]
Lease renewal escalation percentage	2.50%
Commitments under operating leases [Abstract]
2015	$ 15,488
2016	11,757
2017	11,747
2018	11,740
2019	11,375
Thereafter	50,746
Total	112,853
Rent expense under operating leases [Abstract]
Rent expense under operating leases	15,202	14,312	9,875
Facilities
Commitments under operating leases [Abstract]
2015	10,894
2016	11,332
2017	11,607
2018	11,740
2019	11,375
Thereafter	50,746
Total	107,694
Rent expense under operating leases [Abstract]
Rent expense under operating leases	14,659	13,360	9,404
Equipment
Commitments under operating leases [Abstract]
2015	4,594
2016	425
2017	140
2018	0
2019	0
Thereafter	0
Total	5,159
Rent expense under operating leases [Abstract]
Rent expense under operating leases	$ 543	$ 952	$ 471
Facilities - Buildings A and B
Operating Leases [Abstract]
Number of new buildings leased | building	2