Leases - Summary of Operating Leases (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Lessee Lease Description [Line Items]
Operating lease right of use assets, gross	$ 159,111	$ 159,454
Amortization of right-of-use assets	(39,861)	(32,322)
Total operating lease right-of-use assets	119,250	127,132
Real Estate Facilities
Lessee Lease Description [Line Items]
Operating lease right of use assets, gross	156,641	157,010
Office Equipment
Lessee Lease Description [Line Items]
Operating lease right of use assets, gross	1,866	1,864
Other
Lessee Lease Description [Line Items]
Operating lease right of use assets, gross	$ 604	$ 580