Segment Information - Schedule of Reconciliation of Net Income Attributable to Parent (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting Information [Line Items]
Net income (loss) attributable to common shareholders	$ (22,793)	$ 9,360	$ (16,648)	$ 31,181
Depreciation and amortization expense	56,481	46,862	157,586	141,576
Corporate and other	11,086	11,015	37,478	34,888
Third-party real estate services	28,207	29,809	86,260	86,585
Share-based compensation related to Formation Transaction and special equity awards	7,133	9,549	25,432	30,203
Transaction and other costs	845	2,059	7,526	9,928
Interest expense	16,885	10,583	44,660	40,864
Loss on extinguishment of debt			33	1,889
Income tax expense (benefit)	(488)	432	(3,721)	(689)
Net income (loss) attributable to redeemable noncontrolling interests	(2,212)	1,172	(445)	4,271
Third-party real estate services, including reimbursements revenue	26,987	34,587	83,870	91,765
Other revenue	2,292	2,196	5,438	5,951
Income (loss) from unconsolidated real estate ventures, net	(965)	(1,144)	(17,142)	647
Interest and other income (loss), net		(640)	1,021	2,363
Gain on sale of real estate		8,088	59,477	47,121
Consolidated NOI	66,830	77,754	205,497	232,849
Parking
Segment Reporting Information [Line Items]
Revenue	$ 3,100	$ 6,300	$ 10,300	$ 19,500