SCHEDULE IV - MORTGAGE LOANS - Roll Forward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
SEC Schedule, 12-29, Real Estate Companies, Investment in Movement in Mortgage Loans on Real Estate [Roll Forward]
Balance at January 1,	$ 112,357	$ 83,541	$ 70,166
Additions	26,535	59,241	15,123
Deductions	(15,336)	(30,425)	(1,748)
Balance at December 31,	$ 123,556	$ 112,357	$ 83,541