Acquired Lease Intangibles (Details) - Intangible Assets and Liabilities - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Assets:
Acquired lease intangible assets	$ 59,701	$ 72,109
Acquired lease intangible assets, net	59,701	72,109
Liabilities:
Below-market leases	198,272	217,212
Accumulated amortization	(53,515)	(51,066)
Acquired lease intangible liabilities, net	144,757	166,146
In-place leases
Assets:
Acquired lease intangible assets	77,910	92,354
Accumulated amortization	(31,686)	(36,835)
Above-market leases
Assets:
Acquired lease intangible assets	25,039	30,093
Accumulated amortization	$ (11,562)	$ (13,503)