Leases - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Leased Assets [Line Items]
Operating lease, right of use asset	$ 66,760	$ 73,597
Operating lease, liability	85,819
Gain on partial lease termination	0	(2,820)	$ 0
UNITED STATES
Operating Leased Assets [Line Items]
Operating lease, right of use asset	57,300	62,200
Operating lease, liability	75,800	82,900
UNITED STATES | Northern Virginia Office Space
Operating Leased Assets [Line Items]
Operating lease, right of use asset	55,200	59,000
Operating lease, liability	$ 73,600	79,700
Lease term expiration date	Dec. 31, 2030
Lease option to extend, description	option for the Company to extend the term for an additional five or 10 consecutive years
Lease termination fees		1,600
Reduction in right of use assets		4,200
Reduction in lease liability		7,000
Gain on partial lease termination		2,800
Non-US
Operating Leased Assets [Line Items]
Operating lease, right of use asset	$ 9,500	11,400
Operating lease, liability	$ 10,000	$ 12,200
Minimum | UNITED STATES | Northern Virginia Office Space
Operating Leased Assets [Line Items]
Lease extension term	5 years
Maximum | UNITED STATES | Northern Virginia Office Space
Operating Leased Assets [Line Items]
Lease extension term	10 years