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SHAREHOLDERS EQUITY - Stock based compensation - Restricted Stock Awards (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense	$ 0.6		$ 0.6
Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares issued						105,264
Value of shares issued						$ 3.0
Weighted-average grant date fair value (in dollars per share)	$ 28.50		$ 28.50
Recognized compensation expense	$ 0.1	$ 0.5	$ 0.3	$ 0.7
Unrecognized compensation expense	0.6		$ 0.6
Unrecognized compensation expense recognition period (in years)			1 year 6 months
Employee service period
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares issued						52,632
Value of shares issued						$ 1.5
Vesting period (in years)						5 years
Performance of mortgage division
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares issued						52,632
Value of shares issued						$ 1.5
Recognized compensation expense	$ 0.0		$ 0.1		$ 0.6
Shares non-vested	14,114		14,114		38,518
Number of stock awards vested			30,088
Financial Performance Units Granted From May 1, 2019 Through April 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Recognized compensation expense			$ 0.2	0.1
Unrecognized compensation expense recognition period (in years)			3 years 3 months 18 days
Financial Performance Units Granted From May 1, 2019 Through April 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Recognized compensation expense	$ 0.1	0.1
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Recognized compensation expense	$ 0.1	$ 0.1	$ 0.2	$ 0.2