OPERATING PROPERTIES, REAL ESTATE HELD FOR SALE AND OTHER REAL ESTATE OWNED (Details) $ in Thousands	Dec. 31, 2018 USD ($) Project	Dec. 31, 2017 USD ($) Project projects	Dec. 31, 2016 USD ($) Project
Mortgage Loans on Real Estate [Line Items]
Acquired Through Foreclosure and/or Guarantor Settlement	$ 41,145	$ 31,710
Acquired Through Purchase and Costs Incurred	34,550	33,102
Accumulated Depreciation	$ (684)	(171)
Number of projects | Project	16
Real Estate Acquired through Foreclosure	$ (75,011)	(64,641)	$ (122,072)
Held For Sale [Member]
Mortgage Loans on Real Estate [Line Items]
Acquired Through Foreclosure and/or Guarantor Settlement	7,418	1,459
Acquired Through Purchase and Costs Incurred	0	4,394
Accumulated Depreciation	$ 0	$ 0
Number of projects | Project	8	2	10
Real Estate Acquired through Foreclosure	$ (7,418)	$ (5,853)	$ (17,837)
Operating Properties [Member]
Mortgage Loans on Real Estate [Line Items]
Acquired Through Foreclosure and/or Guarantor Settlement	0	0
Acquired Through Purchase and Costs Incurred	34,550	20,655
Accumulated Depreciation	$ (684)	$ (171)
Number of projects | Project	1	1	2
Real Estate Acquired through Foreclosure	$ (33,866)	$ (20,484)	$ (88,734)
Other Real Estate Owned [Member]
Mortgage Loans on Real Estate [Line Items]
Acquired Through Foreclosure and/or Guarantor Settlement	33,727	30,251
Acquired Through Purchase and Costs Incurred	0	8,053
Accumulated Depreciation	$ 0	$ 0
Number of projects | Project	7	15	7
Real Estate Acquired through Foreclosure	$ (33,727)	$ (38,304)	$ (15,501)
California [Member]
Mortgage Loans on Real Estate [Line Items]
Number of projects	3	3
Real Estate Acquired through Foreclosure	$ (34,255)	$ (20,873)
California [Member] | Held For Sale [Member]
Mortgage Loans on Real Estate [Line Items]
Number of projects	1	0
Real Estate Acquired through Foreclosure	$ (137)	$ 0
California [Member] | Operating Properties [Member]
Mortgage Loans on Real Estate [Line Items]
Number of projects	1	1
Real Estate Acquired through Foreclosure	$ (33,866)	$ (20,484)
California [Member] | Other Real Estate Owned [Member]
Mortgage Loans on Real Estate [Line Items]
Number of projects	1	2
Real Estate Acquired through Foreclosure	$ (252)	$ (389)
Texas [Member]
Mortgage Loans on Real Estate [Line Items]
Number of projects	2	2
Real Estate Acquired through Foreclosure	$ (2,977)	$ (3,557)
Texas [Member] | Held For Sale [Member]
Mortgage Loans on Real Estate [Line Items]
Number of projects	1	0
Real Estate Acquired through Foreclosure	$ (2,761)	$ 0
Texas [Member] | Operating Properties [Member]
Mortgage Loans on Real Estate [Line Items]
Number of projects	0	0
Real Estate Acquired through Foreclosure	$ 0	$ 0
Texas [Member] | Other Real Estate Owned [Member]
Mortgage Loans on Real Estate [Line Items]
Number of projects	1	2
Real Estate Acquired through Foreclosure	$ (216)	$ (3,557)
Arizona [Member]
Mortgage Loans on Real Estate [Line Items]
Number of projects	4	5
Real Estate Acquired through Foreclosure	$ (2,988)	$ (3,030)
Arizona [Member] | Held For Sale [Member]
Mortgage Loans on Real Estate [Line Items]
Number of projects	4	0
Real Estate Acquired through Foreclosure	$ (2,988)	$ 0
Arizona [Member] | Operating Properties [Member]
Mortgage Loans on Real Estate [Line Items]
Number of projects	0	0
Real Estate Acquired through Foreclosure	$ 0	$ 0
Arizona [Member] | Other Real Estate Owned [Member]
Mortgage Loans on Real Estate [Line Items]
Number of projects	0	5
Real Estate Acquired through Foreclosure	$ 0	$ (3,030)
Minnesota [Member]
Mortgage Loans on Real Estate [Line Items]
Number of projects	2	2
Real Estate Acquired through Foreclosure	$ (1,532)	$ (1,622)
Minnesota [Member] | Held For Sale [Member]
Mortgage Loans on Real Estate [Line Items]
Number of projects	2	1
Real Estate Acquired through Foreclosure	$ (1,532)	$ (1,473)
Minnesota [Member] | Operating Properties [Member]
Mortgage Loans on Real Estate [Line Items]
Number of projects	0	0
Real Estate Acquired through Foreclosure	$ 0	$ 0
Minnesota [Member] | Other Real Estate Owned [Member]
Mortgage Loans on Real Estate [Line Items]
Number of projects	0	1
Real Estate Acquired through Foreclosure	$ 0	$ (149)
Utah [Member]
Mortgage Loans on Real Estate [Line Items]
Number of projects | projects		1
Real Estate Acquired through Foreclosure		$ (4,380)
Utah [Member] | Held For Sale [Member]
Mortgage Loans on Real Estate [Line Items]
Number of projects | projects		1
Real Estate Acquired through Foreclosure		$ (4,380)
Utah [Member] | Operating Properties [Member]
Mortgage Loans on Real Estate [Line Items]
Number of projects | projects		0
Real Estate Acquired through Foreclosure		$ 0
Utah [Member] | Other Real Estate Owned [Member]
Mortgage Loans on Real Estate [Line Items]
Number of projects | projects		0
Real Estate Acquired through Foreclosure		$ 0
New Mexico [Member]
Mortgage Loans on Real Estate [Line Items]
Number of projects	5	5
Real Estate Acquired through Foreclosure	$ (33,259)	$ (31,179)
New Mexico [Member] | Held For Sale [Member]
Mortgage Loans on Real Estate [Line Items]
Number of projects	0	0
Real Estate Acquired through Foreclosure	$ 0	$ 0
New Mexico [Member] | Operating Properties [Member]
Mortgage Loans on Real Estate [Line Items]
Number of projects	0	0
Real Estate Acquired through Foreclosure	$ 0	$ 0
New Mexico [Member] | Other Real Estate Owned [Member]
Mortgage Loans on Real Estate [Line Items]
Number of projects	5	5
Real Estate Acquired through Foreclosure	$ (33,259)	$ (31,179)
Continuing and Discontinued Operations [Member]
Mortgage Loans on Real Estate [Line Items]
Number of projects | projects		18
Real Estate Acquired through Foreclosure		$ (64,641)
Continuing and Discontinued Operations [Member] | Held For Sale [Member]
Mortgage Loans on Real Estate [Line Items]
Number of projects | projects		2
Real Estate Acquired through Foreclosure		$ (5,853)
Continuing and Discontinued Operations [Member] | Operating Properties [Member]
Mortgage Loans on Real Estate [Line Items]
Number of projects | projects		1
Real Estate Acquired through Foreclosure		$ (20,484)
Continuing and Discontinued Operations [Member] | Other Real Estate Owned [Member]
Mortgage Loans on Real Estate [Line Items]
Number of projects | projects		15
Real Estate Acquired through Foreclosure		$ (38,304)