FAIR VALUE OF FINANCIAL INSTRUMENTS (Commercial Mortgage Loans) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value	$ 42,520	$ 25,828
Valuation allowance	(72)	(46)
Total mortgage loans	$ 42,448	$ 25,782
Percent of Total	100.00%	100.00%
Multifamily
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value	$ 11,741	$ 3,244
Percent of Total	27.60%	12.60%
Office
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value	$ 11,848	$ 11,627
Percent of Total	27.90%	45.00%
Retail
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value	$ 2,227	$ 0
Percent of Total	5.20%	0.00%
Mixed use/Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value	$ 16,704	$ 10,957
Percent of Total	39.30%	42.40%
East North Central
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value	$ 3,245	$ 3,244
Percent of Total	7.60%	12.60%
Southern Atlantic
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value	$ 7,026	$ 6,652
Percent of Total	16.50%	25.80%
East South Central
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value	$ 8,358	$ 4,975
Percent of Total	19.70%	19.30%
New England
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value	$ 6,588	$ 6,588
Percent of Total	15.50%	25.40%
Middle Atlantic
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value	$ 15,076	$ 4,369
Percent of Total	35.50%	16.90%
Mountain
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value	$ 2,227	$ 0
Percent of Total	5.20%	0.00%
Less than 65%
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value	$ 34,024	$ 25,828
65%-75%
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value	8,496	0
Greater than 75%
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value	$ 0	$ 0