FAIR VALUE OF FINANCIAL INSTRUMENTS - Narrative (Details) - Level 2 - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Market valuation | Junior subordinated notes
Financial Instruments Not Measured at Fair Value
Market interest rate (as a percent)	6.41%	7.79%
Market valuation | Mortgages | Minimum
Financial Instruments Not Measured at Fair Value
Market interest rate (as a percent)	3.89%	4.14%
Market valuation | Mortgages | Maximum
Financial Instruments Not Measured at Fair Value
Market interest rate (as a percent)	4.33%	5.09%
Estimated fair value | Junior subordinated notes
Financial Instruments Not Measured at Fair Value
Estimated fair value lower than carrying value	$ 9,589	$ 11,974
Estimated fair value | Mortgages
Financial Instruments Not Measured at Fair Value
Estimated fair value lower than carrying value	$ 321	$ 5,336