GOODWILL AND INTANGIBLE ASSETS - Component of Other Identifiable Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 9,204	$ 4,771
Accumulated Amortization	2,024	861
Core Deposit Intangibles
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	8,390	3,840
Accumulated Amortization	1,493	190
Other client relationship intangibles
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	524	931
Accumulated Amortization	338	671
Other intangible, fully amortized	406
Non-compete agreement
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	290	0
Accumulated Amortization	$ 193	$ 0