Lease Intangibles - Schedule of Intangible Assets and Liabilities Included in Other Assets and Other Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Amortizable Intangible Assets, Gross Carrying Amount	$ 287,523	$ 267,188
Amortizable Intangible Assets, Accumulated Amortization	(168,272)	(150,368)
Amortizable Intangible Assets, Net Carrying Amount	119,251	116,820
Amortizable Intangible Liabilities
Amortizable Intangible Liabilities, Gross Carrying Amount	(165,085)	(160,721)
Amortizable Intangible Liabilities, Accumulated Amortization	83,757	78,315
Amortizable Intangible Liabilities, Net Carrying Amount	(81,328)	(82,406)
Above-market Ground Lease, Gross	(671)	(671)
Above-market Ground Lease, Accumulated Amortization	180	151
Above-market Ground Lease, Net	(491)	(520)
Finite-Lived Intangible Liabilities, Gross	(165,756)	(161,392)
Finite-Lived Intangible Liabilities, Accumulated Amortization	83,937	78,466
Finite-Lived Intangible Liabilities, Net	(81,819)	(82,926)
In-place lease intangible assets
Finite-Lived Intangible Assets [Line Items]
Amortizable Intangible Assets, Gross Carrying Amount	268,335	249,961
Amortizable Intangible Assets, Accumulated Amortization	(154,313)	(137,108)
Amortizable Intangible Assets, Net Carrying Amount	114,022	112,853
Amortizable Intangible Liabilities
Amortizable Intangible Liabilities, Net Carrying Amount	(76,099)
Above-market rent
Finite-Lived Intangible Assets [Line Items]
Amortizable Intangible Assets, Gross Carrying Amount	19,188	17,227
Amortizable Intangible Assets, Accumulated Amortization	(13,959)	(13,260)
Amortizable Intangible Assets, Net Carrying Amount	$ 5,229	$ 3,967