Segment Information - Additional Information (Details) $ in Thousands		12 Months Ended
		Dec. 31, 2020 USD ($) segment	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Segment information
Number of reportable segments (segment) | segment		2
Total revenues		$ 1,052,744	$ 1,238,995	$ 1,227,392
Net Income		414,758	291,487	270,856
Total assets	[1]	11,707,567	12,766,320
Marketing, general and administrative		91,826	100,875	92,631
Operating Segments | Real Estate Segment
Segment information
Total revenues		932,581	1,043,405	1,025,900
Net Income		354,353	158,972	129,253
Total assets		10,579,899	11,063,155
Operating Segments | Debt and Preferred Equity Segment
Segment information
Total revenues		120,163	195,590	201,492
Net Income		60,405	132,515	$ 141,603
Total assets		$ 1,127,668	$ 1,703,165

[1] (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: $41.2 million and $205.2 million of land, $57.9 million and $481.9 million of building and improvements, $2.0 million and $2.0 million of building and leasehold improvements, $37.8 million and $61.7 million of right of use assets, $10.3 million and $17.6 million of accumulated depreciation, $289.5 million and $169.5 million of other assets included in other line items, $94.0 million and $457.1 million of real estate debt, net, $0.7 million and $1.2 million of accrued interest payable, $29.9 million and $57.7 million of lease liabilities, and $56.6 million and $43.7 million of other liabilities included in other line items as of December 31, 2020 and December 31, 2019, respectively.