SHAREHOLDERS' EQUITY (Details)	1 Months Ended	9 Months Ended	12 Months Ended
	Aug. 28, 2019	Sep. 30, 2018 USD ($) shares	Dec. 31, 2016 shares	Dec. 31, 2015 shares	Dec. 31, 2014 shares	Dec. 31, 2013 shares	Sep. 30, 2019 USD ($) Program	Apr. 28, 2015 USD ($)	Dec. 17, 2013 USD ($)	Feb. 27, 2013 USD ($)
Participation in the TARP Capital Purchase Program
Number of shares authorized to be repurchased							$ 25,000		$ 600,000	$ 600,000
Number of additional shares authorized to be repurchased								$ 750,000
Proceeds of common stock offering, net of offering costs		$ 32,451,000
Number of share repurchase programs | Program							2
Maximum
Participation in the TARP Capital Purchase Program
Percentage of outstanding common stock authorized to repurchase	5.00%
Shares of Common Stock
Participation in the TARP Capital Purchase Program
Number of shares repurchased | shares			14,000	102,455	13,700	55,594
Shares issued (in shares) | shares		2,225,807