Real Estate (Rental Income) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Lease Income [Abstract]
Rental income from operating leases	$ 198,183,000	$ 184,311,000
Earned income from direct financing leases	144,000	151,000
Percentage rent	763,000	701,000
Real estate expense reimbursement from tenants	4,540,000	4,600,000
Rental income	203,630,000	189,763,000
Rental income accrued during period	469,000	1,096,000
Balance of accrued rental income	1,706,000	4,057,000
Originally rent due			$ 4,722,000	$ 51,945,000
Straight-line accrued rent from rent deferral repayments	$ 9,000	$ 1,780,000