Leases - Summary of Operating Leases (Details) $ in Thousands	Jun. 30, 2019 USD ($)
Lessee Lease Description [Line Items]
Operating lease right of use assets, gross	$ 148,085
Amortization of right-of-use assets	(15,370)
Total operating lease right-of-use assets	132,715
Real Estate Facilities
Lessee Lease Description [Line Items]
Operating lease right of use assets, gross	145,359
Office Equipment
Lessee Lease Description [Line Items]
Operating lease right of use assets, gross	2,203
Other
Lessee Lease Description [Line Items]
Operating lease right of use assets, gross	$ 523