SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) $ in Thousands		3 Months Ended		6 Months Ended
	Jan. 01, 2020 USD ($)	Jun. 30, 2020 USD ($) subsidary Family Residentialhouse	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) subsidary Family Residentialhouse	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Property, Plant and Equipment [Line Items]
Number of subsidiaries | subsidary		6		6
Provision for loan losses		$ 12,100	$ 575	$ 13,500	$ 1,150
Decrease to retained earnings		$ 97,788		97,788		$ 98,239
Retained earnings, net of tax				$ 955
Number of families secured by loans of real estate | Family		4		4
Number of housing units secured by loans from segment | Residentialhouse		5		5
Paycheck Protection Program Loans
Property, Plant and Equipment [Line Items]
Percentage of government guaranteed loans		100.00%		100.00%
Accounting Standards Update 2016-13
Property, Plant and Equipment [Line Items]
Increase to allowance for credit losses	$ 4,548
Increase to allowance for credit losses, percent	28.10%
Provision for loan losses		$ 13,500		$ 13,500
Accounting Standards Update 2016-13 | Cumulative Effect | Revision of Prior Period, Adjustment
Property, Plant and Equipment [Line Items]
Decrease to retained earnings		$ (3,593)		(3,593)
Retained earnings, net of tax				$ 955