Real Estate (Key Information for Leases) (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2022 USD ($) Tenant	Mar. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Lessor, Lease, Description [Line Items]
Weighted average remaining lease term	10 years 7 months 6 days
Operating	3,285
Direct financing	5
Leases classified as operating leases	3,285
Straight Line Rent | $	$ (1,780,000)	$ (9,381,000)
Leases classified as direct financing leases	5
Rent deferral, year ending December 31, 2021 | $			$ 4,758,000,000	$ 52,019,000,000
Deferred rent repaid | $	$ 4,063,000		$ 31,776,000,000
Minimum
Lessor, Lease, Description [Line Items]
Initial lease term	10 years
Maximum
Lessor, Lease, Description [Line Items]
Initial lease term	20 years