Acquired Intangible Assets and Liabilities (Schedule of Amortization of Acquired In Place Lease Value, Above Market Ground Lease, Above and Below Market Lease Values) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Acquired Finite Lived Intangible Assets [Line Items]
Amortization recorded as a (reduction) increase to rental income	$ 773	$ 2,073	$ 1,405
Acquired in-place lease value [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Amortization recorded as amortization expense	10,369	14,724	17,841
Acquired above market lease value [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Amortization recorded as a (reduction) increase to rental income	(2,966)	(3,089)	(3,502)
Acquired below market lease value [Member]
Acquired Finite Lived Intangible Assets [Line Items]
Amortization recorded as a (reduction) increase to rental income	$ 3,739	$ 5,162	$ 4,907