Commitments and Contingencies (Details)	Dec. 31, 2019 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Outstanding letters of credit and performance bonds	$ 1,100,000
Future obligations under leases	205,400,000
Lessee, Lease, Description [Line Items]
Letters of credit outstanding	0
Operating leases	214,024,000
Operating leases other than ground leases
Lessee, Lease, Description [Line Items]
Operating leases	$ 404,000