Leases - Summary of Leases as Lessor (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Nov. 03, 2020
Lessor, Lease, Description [Line Items]
Allowance for doubtful straight-line receivables		$ (3,089)	$ (710)	$ (5,760)	$ (1,524)
Operating Leases, Lease Income
Base rent		83,871	89,754	264,974	267,823
Percentage and specialty rent		488	610	1,812	2,612
Tenant recoveries		26,429	26,323	75,994	79,029
Lease termination fee income		223	331	599	1,751
Other lease-related income		1,232	1,560	3,781	4,446
Straight-line rental income, net		(269)	581	(1,212)	2,697
Uncollectible lease income, net		(5,039)	(569)	(25,415)	(1,046)
Amortization of above and below market lease intangibles and lease inducements		423	1,127	2,323	3,557
Lease income		107,358	$ 119,717	322,856	$ 360,869
COVID-19
Lessor, Lease, Description [Line Items]
Variable lease adjustments to base rent		6,051		6,102
Base rent adjustments related to cash-basis tenants		3,869		11,938
Amount of lease concessions agreed in principle but not yet executed		4,517		4,517
Variable lease adjustments agreed in the prior period but executed during the current period		(4,381)
Deferred base rent related to prior period	$ 7,965	7,965		7,965
Deferred base rent related to current period	4,878	4,878		4,878
Abatements and deferrals of base rent related to prior period	6,965	6,965		6,965
Abatements and deferrals of base rent related to current period	$ 3,028	$ 3,028		3,028
Weighted average deferral period	4 months
Weighted average repayment period	11 months
Security deposits applied to accounts receivable				$ 2,999
Subsequent events | COVID-19
Lessor, Lease, Description [Line Items]
Uncollected prior period base rent addressed						$ 765
Uncollected current period base rent addressed						190
Uncollected base rent related to future periods addressed						$ 937