Restricted Cash, Other Assets and Other Liabilities - Schedule of Accrued and Other Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Restricted Cash, Other Assets And Other Liabilities [Abstract]
Tenant security deposits and payable	$ 15,628	$ 15,293
Borrower escrow deposits	8,234	9,903
Deferred income	37,896	32,318
Interest payable	36,325	38,487
Derivative liabilities (Note 11)	84,271	127,531
Current and deferred income tax liability	208,818	222,206
Operating lease liability	178,692	181,297
Accrued compensation	34,963	83,351
Accrued carried interest and incentive fee compensation	1,179	50,360
Accrued real estate and other taxes	37,709	39,923
Accounts payable and accrued expenses	136,439	143,852
Other liabilities	57,127	71,377
Total accrued and other liabilities	837,281	1,015,898
Deferred asset management fee income	$ 22,100	$ 18,300
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Fee income, weighted-average recognition period	1 year 6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Fee income, weighted-average recognition period		1 year 2 months 12 days