Intangible Assets and Intangible Liabilities - Summary of Intangible Assets and Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Intangible assets:
Gross amount	$ 338,930		$ 371,555
Accumulated amortization	(226,822)		(252,142)
Intangible assets, Net	112,108		119,413
Intangible liabilities:
Gross amount	138,726		151,118
Accumulated amortization	(95,530)		(105,790)
Intangible Liabilities, Net	43,196		$ 45,328
Leases, Acquired-in-Place, Market Adjustment [Member]
Intangible liabilities:
Amortization of above and below-market leases, net (component of "rental revenue")	358	$ 855
Leases, Acquired-in-Place [Member]
Intangible liabilities:
Amortization of acquired in-place leases (component of "depreciation and amortization")	$ 5,531	$ 7,219