Restricted Cash, Other Assets and Other Liabilities - Schedule of Accrued and Other Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Restricted Cash, Other Assets And Other Liabilities [Abstract]
Tenant security deposits and payable	$ 13,676		$ 13,676		$ 12,457
Borrower escrow deposits	6,707		6,707		9,903
Deferred income	40,067		40,067		30,040
Interest payable	28,072		28,072		28,902
Derivative liabilities (Note 11)	96,944		96,944		127,531
Current and deferred income tax liability	170,962		170,962		222,206
Operating lease liability	159,026		159,026		156,147
Accrued compensation	56,546		56,546		72,859
Accrued carried interest and incentive fee compensation	1,151		1,151		50,360
Accrued real estate and other taxes	34,444		34,444		22,091
Accounts payable and accrued expenses	111,840		111,840		91,614
Other liabilities	70,431		70,431		63,409
Total accrued and other liabilities	789,866		789,866		887,519
Deferred asset management fee income	13,400		13,400		$ 18,300
Deferred asset management fee income recognized	$ 6,200	$ 300	$ 12,000	$ 1,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Fee income, weighted-average recognition period					1 year 2 months 12 days
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Fee income, weighted-average recognition period	1 year 7 months 6 days		1 year 7 months 6 days