Segment Information - Schedule of Reconciliation of Net Income (loss) Attributable to Common Shareholders to Consolidated NOI (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Information
Net income (loss) attributable to common shareholders	$ (45,655)	$ (22,793)	$ (36,780)	$ 42,925	$ 34,390	$ 9,360	$ (3,040)	$ 24,861	$ (62,303)	$ 65,571	$ 39,924
Depreciation and amortization expense									221,756	191,580	211,436
Corporate and other									46,634	46,822	33,728
Third-party real estate services									114,829	113,495	89,826
Share-based compensation related to Formation Transaction and special equity awards									31,678	42,162	36,030
Transaction and other costs									8,670	23,235	27,706
Interest expense									62,321	52,695	74,447
Loss on extinguishment of debt									62	5,805	5,153
Impairment loss	$ 10,200				$ 10,200				10,232
Reduction of gain on bargain purchase											7,606
Income tax benefit									(4,265)	(1,302)	(738)
Net income (loss) attributable to redeemable noncontrolling interests									(4,958)	8,573	6,710
Third-party real estate services, including reimbursements revenue									113,939	120,886	98,699
Other revenue									15,372	7,638	6,358
Income (loss) from unconsolidated real estate ventures, net									(20,336)	(1,395)	39,409
Interest and other income (loss), net									(625)	5,385	15,168
Gain on sale of real estate									59,477	104,991	52,183
Net loss attributable to noncontrolling interests											21
Consolidated NOI									$ 256,829	$ 311,131	$ 319,990