COMPREHENSIVE INCOME (LOSS) - Changes in AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ 675,139	$ 363,448	$ 665,794	$ 357,574
Amounts reclassified to accumulated other comprehensive income for transfer of securities to available for sale			522
Balance at end of period	684,455	371,118	684,455	371,118
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	4,258	130	1,480	(2,358)
Other comprehensive income (loss) before reclassifications	(2,084)		3,934
Amounts reclassified to accumulated other comprehensive income for transfer of securities to available for sale			522
Amounts reclassified from accumulated other comprehensive income (loss)	(157)		(2,682)
Net current period other comprehensive income (loss)	(2,241)		1,774
Related tax effect	880		(357)
Balance at end of period	2,897	1,466	2,897	1,466
Securities available for sale
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	4,258	130	1,480	(2,358)
Other comprehensive income (loss) before reclassifications	(471)	2,980	5,547	6,171
Amounts reclassified to accumulated other comprehensive income for transfer of securities to available for sale			522	(1,267)
Amounts reclassified from accumulated other comprehensive income (loss)	(8)	(1,267)	(2,533)
Net current period other comprehensive income (loss)	(479)	1,713	3,536	4,904
Related tax effect	387	(377)	(850)	(1,080)
Balance at end of period	4,166	$ 1,466	4,166	$ 1,466
Cash flow hedge
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other comprehensive income (loss) before reclassifications	(1,613)		(1,613)
Amounts reclassified from accumulated other comprehensive income (loss)	(149)		(149)
Net current period other comprehensive income (loss)	(1,762)		(1,762)
Related tax effect	493		493
Balance at end of period	$ (1,269)		$ (1,269)