Acquired Intangible Assets and Liabilities (Schedule of Intangible Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Intangible assets:
Accumulated amortization	$ (144,457)	$ (131,121)
Acquired lease intangibles, net	58,203	71,539
Intangible liabilities:
Acquired below market lease value	70,260	70,260
Accumulated amortization	(32,342)	(28,602)
Acquired below market lease intangibles, net	37,918	41,658
Acquired in-place lease value [Member]
Intangible assets:
Acquired intangible assets	156,918	156,918
Acquired lease intangibles, net	37,342
Acquired above market lease value [Member]
Intangible assets:
Acquired intangible assets	45,742	$ 45,742
Acquired lease intangibles, net	$ 20,861