FAIR VALUE - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Additional provision for loan losses	$ 3,500	$ 400	$ 4,100	$ 1,200
Assets measured at fair value on non-recurring basis
Outstanding balance of impaired loans with an allowance recorded	5,506		5,506		$ 2,721
Valuation allowance on impaired loans	715		715		189
Other Real Estate	0		0		175
Other real estate owned valuation allowance	0		0		0
Real estate owned additional provision			0		0
Non-recurring basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Additional provision for loan losses			500		200
Assets measured at fair value on non-recurring basis
Outstanding balance of impaired loans with an allowance recorded	5,500		5,500		2,700
Valuation allowance on impaired loans	700		700		200
Carrying Amount | Non-recurring basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying amount of impaired loans	$ 4,791		$ 4,791		2,532
Assets measured at fair value on non-recurring basis
Other Real Estate					$ 175