Commitments and Contingencies Operating Lease Obligations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020		Dec. 31, 2019
Contractual Commitments, Commitment [Line Items]
Lease cost	$ 22,759		$ 23,540
Variable lease cost	3,550		3,580
Sublease income	(781)		(953)
Total lease costs	25,735		26,420
Facility Leases
Contractual Commitments, Commitment [Line Items]
Short-term lease cost	$ 207	[1],[2]	$ 253

[1] During the year ended December 31, 2020, the Company recognized an increase of $1.6 million of operating right-of-use assets and leases liabilities related to for facility leases.

[2] The Company has entered into various agreements to sublease certain of its premises.