Investments in Unconsolidated Real Estate Joint Ventures (Summary Balance Sheets for Unconsolidated Joint Ventures) (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Assets
Land	$ 303,605	$ 303,605
Buildings, improvements and fixtures	2,944,077	2,938,434
Construction in progress	39,249	29,201
Rental property, at cost, total	3,286,931	3,271,240
Accumulated depreciation	(1,347,011)	(1,318,264)
Total rental property, net	1,939,920	1,952,976
Cash and cash equivalents	8,137	12,778	$ 202,821	$ 212,124
Deferred lease costs and other intangibles, net	86,436	91,269
Prepaids and other assets	110,151	108,609
Total assets	2,301,166	2,324,119
Liabilities and Owners’ Equity
Mortgages payable, net	62,772	64,041
Owners’ equity	579,723	591,313	$ 506,306	$ 513,934
Total liabilities and equity	2,301,166	2,324,119
Total liabilities	1,721,443	1,732,806
Unconsolidated Properties
Assets
Land	81,254	82,962
Buildings, improvements and fixtures	463,592	466,496
Construction in progress	134	223
Rental property, at cost, total	544,980	549,681
Accumulated depreciation	(206,826)	(203,395)
Total rental property, net	338,154	346,286
Cash and cash equivalents	14,188	14,040
Deferred lease costs and other intangibles, net	2,638	2,637
Prepaids and other assets	9,534	11,616
Total assets	364,514	374,579
Liabilities and Owners’ Equity
Mortgages payable, net	319,290	319,957
Accounts payable and other liabilities	13,015	16,013
Owners’ equity	32,209	38,609
Total liabilities and equity	364,514	374,579
Total liabilities	$ 332,305	$ 335,970