Leases - Summary of Operating Leases (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Lessee Lease Description [Line Items]
Operating lease right of use assets, gross	$ 181,359	$ 168,275
Amortization of right-of-use assets	(36,015)	(34,310)
Total operating lease right-of-use assets	145,344	133,965
Real Estate Facilities
Lessee Lease Description [Line Items]
Operating lease right of use assets, gross	178,227	165,752
Office Equipment
Lessee Lease Description [Line Items]
Operating lease right of use assets, gross	2,269	1,631
Other
Lessee Lease Description [Line Items]
Operating lease right of use assets, gross	$ 863	$ 892