Real Estate (Key Information for Leases) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021 USD ($) tenant	Mar. 31, 2021 USD ($)	Jun. 30, 2021 USD ($) tenant	Dec. 31, 2020 USD ($)
Lessor, Lease, Description [Line Items]
Weighted average remaining lease term			10 years 7 months 6 days
Leases classified as operating leases | tenant	3,158		3,158
Leases classified as direct financing leases | tenant	6		6
Rent deferral, year ending December 31, 2021				$ 51,799
Rent deferral, year ending December 31, 2020	$ 4,758		$ 4,758
Deferred rent repaid	10,416	$ 3,259	21,151
Deferred rent to be repaid during year ended December 31, 2021	$ 10,889		$ 10,889
Minimum
Lessor, Lease, Description [Line Items]
Initial lease term			10 years
Maximum
Lessor, Lease, Description [Line Items]
Initial lease term			20 years