Summary of Significant Accounting Policies - Leases (Details)	12 Months Ended
	Dec. 31, 2019
Lessor, Operating Lease, Termination Term	1 year
Minimum
Lessee, Operating Lease, Remaining Lease Term	1 year
Maximum
Lessee, Operating Lease, Remaining Lease Term	34 years
Lessor, Operating Lease, Remaining Lease Term	32 years
Lessor, Operating Lease, Renewal Term	27 years