OPERATING PROPERTIES, REAL ESTATE HELD FOR SALE AND OTHER REAL ESTATE OWNED (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) Property	Sep. 30, 2018 USD ($)	May 29, 2019 USD ($)	Dec. 31, 2018 USD ($)
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
REO assets acquired through foreclosure	$ 105,800		$ 105,800			$ 75,000
Assets	152,559		152,559			143,639
Liabilities	66,663		66,663			47,066
Operating lease right of use assets	1,330		1,330
Operating lease liabilities in accounts payable and other accrued expenses	1,431	$ 0	1,431	$ 0
Proceeds from sale of REO			895	8,709
Gain on disposal of assets	223	3,543	244	3,938
Real estate operating costs and expenses	4,800	2,500	11,000	7,200
Cash outlays for capitalized development costs			$ 13,359	7,208
Broadway Tower
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Assets					$ 22,600
Liabilities					15,500
Operating lease right of use assets					600
Operating lease liabilities in accounts payable and other accrued expenses					$ 600
Number of real estate properties sold (in properties) | Property			4
Proceeds from sale of REO		8,100	$ 900	8,700
Gain on disposal of assets	200	$ 3,500	200	$ 3,900
Held For Sale
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
REO assets acquired through foreclosure	7,400		7,400			7,400
Operating Properties
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
REO assets acquired through foreclosure	65,100		65,100			33,900
Other Real Estate Owned
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
REO assets acquired through foreclosure	$ 33,300		$ 33,300			$ 33,700