Held for - Sale Assets Held for Sale (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Balance Sheet data (as of the period ended):
Land	$ 387,918	$ 362,695
Buildings, improvements and lease intangibles	4,458,119	4,220,297
Personal property	11,761	11,195
Total real estate investments	5,104,942	4,641,080
Less accumulated depreciation	(1,338,743)	(1,239,224)
Total real estate investments, net	3,766,199	3,401,856
Assets held for sale, net	57	20,646
Liabilities of properties held for sale	294	1,216
Disposal Group, Held-for-sale, Not Discontinued Operations
Balance Sheet data (as of the period ended):
Land	0	1,664
Buildings, improvements and lease intangibles		27,443
Personal property	0	39
Total real estate investments	0	29,146
Less accumulated depreciation	0	(10,455)
Total real estate investments, net	0	18,691
Other assets, net	57	1,955
Assets held for sale, net	57	20,646
Accounts payable and accrued liabilities	169	533
Other liabilities	125	683
Liabilities of properties held for sale	$ 294	$ 1,216