Real Estate (Rental Income) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Real Estate [Abstract]
Rental income from operating leases	$ 805,136,000	$ 751,680,000	$ 703,865,000
Earned income from direct financing leases	560,000	595,000	623,000
Percentage rent	1,631,000	1,541,000	706,000
Rental Revenues	807,327,000	753,816,000	705,194,000
Real estate expense reimbursement from tenants	18,763,000	17,802,000	18,665,000
Rental income	826,090,000	771,618,000	723,859,000
Rental income accrued during period	7,453,000	(3,559,000)	(21,137,000)
Originally rent due			4,722,000	$ 51,723,000
Repayments of deferred rent	3,124,000	$ 14,478,000	$ 31,776,000
increase of accrued rental income	$ 5,573,000