Segment Information - Additional Information (Details) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) segment	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Segment information
Number of reportable segments | segment				2
Total revenues		$ 205,201	$ 249,844	$ 649,410	$ 817,846
Net income		415,534	20,677	528,813	214,418
Total assets	[1]	10,855,859		10,855,859		$ 11,707,567
Marketing, general and administrative		23,477	23,602	68,426	66,682
Operating Segments | Real Estate Segment
Segment information
Total revenues		185,129	226,856	589,958	716,382
Net income		398,377	10,097	478,589	161,388
Total assets		9,761,694		9,761,694		10,579,899
Operating Segments | Debt and Preferred Equity Segment
Segment information
Total revenues		20,072	22,988	59,452	101,464
Net income		17,157	$ 10,580	50,224	$ 53,030
Total assets		$ 1,094,165		$ 1,094,165		$ 1,127,668

[1] The Company's consolidated balance sheets include assets and liabilities of consolidated variable interest entities ("VIEs"). See Note 2. The consolidated balance sheets include the following amounts related to our consolidated VIEs, excluding the Operating Partnership: $316.0 million and $41.2 million of land, $341.2 million and $57.9 million of building and improvements, $2.0 million and $2.0 million of building and leasehold improvements, $53.2 million and $37.8 million of right of use assets, $18.5 million and $10.3 million of accumulated depreciation, $293.8 million and $289.5 million of other assets included in other line items, $450.1 million and $94.0 million of real estate debt, net, $1.3 million and $0.7 million of accrued interest payable, $45.4 million and $29.9 million of lease liabilities, and $24.9 million and $56.6 million of other liabilities included in other line items as of September 30, 2021 and December 31, 2020, respectively.