Significant Accounting Policies - Schedule of Intangible Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	$ 87,657	$ 88,594
Below-market leases, gross	(44,598)	(44,099)
Finite-lived intangible assets (liabilities), gross	45,126	44,495
Below-market lease, accumulated amortization	17,417	15,972
Finite-lived intangible assets (liabilities), accumulated amortization	(48,339)	(47,385)
Below-market leases, net	(27,181)	(28,127)
Total	(3,213)	(2,890)
In-place leases
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	85,555	84,425
Finite-lived intangible assets, accumulated amortization	(61,847)	(59,504)
Finite-lived intangible assets, net	23,708	24,921
Above-market leases
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, gross	4,169	4,169
Finite-lived intangible assets, accumulated amortization	(3,909)	(3,853)
Finite-lived intangible assets, net	$ 260	$ 316