Quarterly Financial Data (Unaudited) (Additional Information) (Details) - USD ($)	3 Months Ended						4 Months Ended	6 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2020	Jun. 30, 2021	Jun. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reduction in net income attributable													$ 200,000	$ 700,000
Per shares													$ 0.01	$ 0.01
Allowance for credit loss												$ (2,796,000)	$ 24,569,000	$ 2,742,000
Adjustments To Straight Line Rent Reserves												2,682,000	21,871,000	1,961,000
Straight - Line Rent Reserves												6,726,000	4,869,000	4,185,000
Non cash Lease Expense												3,721,000	3,392,000	0
Lease liability - operating leases												$ (3,636,000)	$ (1,579,000)	$ 2,014,000
Cumulative Effect of Change in Accounting Principle
Reduction in net income attributable	$ 100,000	$ 200,000	$ 300,000	$ 0.0	$ 100,000	$ 0.0	$ 100,000	$ 500,000	$ 100,000	$ 600,000	$ 100,000
Per shares	$ 0.00	$ 0.00	$ 0.01	$ 0.00	$ 0.00	$ 0.00	$ 0.01	$ 0.01	$ 0.00	$ 0.01	$ 0.00
Recognition of Additional reserves	$ 800,000	$ 900,000	$ 1,400,000					$ 200,000		$ 200,000
Notes receivable	$ 3,100,000	$ 2,300,000	$ 300,000					$ 500,000		$ 700,000
Allowance for credit loss						$ 1,300,000			$ 9,700,000		$ 20,500,000
Adjustments To Straight Line Rent Reserves						3,000,000.0			6,500,000		19,700,000
Straight - Line Rent Reserves						1,100,000			2,900,000		4,000,000.0
Non cash Lease Expense						600,000			1,400,000		2,400,000
Lease liability - operating leases						$ 400			$ 800,000		$ 1,000,000.0