Deferred Leasing Costs and Other Intangibles - Summary of the Amortization of Deferred Leasing Costs and Intangibles (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Finite-Lived Intangible Assets [Line Items]
Below-market lease values	$ 294	$ 2,130	$ 2,353	$ 5,612
Net increase (decrease) to property operating income	(157)	830	409	2,423
Deferred leasing costs	1,428	2,281	4,669	6,828
Amortization expense	4,134	7,869	14,735	24,109
Above-market lease values
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	(451)	(1,300)	(1,944)	(3,189)
In-place lease values
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	2,588	5,468	9,685	16,922
Other intangibles
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	$ 118	$ 120	$ 381	$ 359