SEGMENT REPORTING - Reconciliation of Segment Net Income Loss and Assets (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Reportable segments and reconciliation to consolidated results [Abstract]
Interest and dividend income		$ 29,015	$ 20,999	$ 83,041	$ 56,995
Interest expense		10,998	2,009	26,482	3,687
Net interest income		18,017	18,990	56,559	53,308
Provision for credit losses	[1]	449	1,255	962	(1,634)
Net interest income after provision for credit losses		17,568	17,735	55,597	54,942
Other non-interest income		7,808	5,036	18,678	16,018
Legal accruals and settlements			0		0
Other non-interest expenses		15,668	14,577	47,417	43,587
Income (loss) before income tax expense (benefit)		9,708	8,194	26,858	27,373
Income tax expense (benefit)		2,060	1,741	5,660	6,029
Segment net income (loss)		7,648	6,453	21,198	21,344
Assets		2,707,834	2,551,422	2,707,834	2,551,422	$ 2,645,553
Operating Segments | Core Banking
Reportable segments and reconciliation to consolidated results [Abstract]
Interest and dividend income		28,979	20,983	82,939	56,965
Interest expense		10,998	2,009	26,482	3,687
Net interest income		17,981	18,974	56,457	53,278
Provision for credit losses		449	1,255	962	(1,634)
Net interest income after provision for credit losses		17,532	17,719	55,495	54,912
Other non-interest income		5,002	2,417	10,354	7,552
Legal accruals and settlements			0		0
Other non-interest expenses		13,597	12,559	41,187	37,316
Income (loss) before income tax expense (benefit)		8,937	7,577	24,662	25,148
Income tax expense (benefit)		1,908	1,590	5,215	5,523
Segment net income (loss)		7,029	5,987	19,447	19,625
Assets		2,701,959	2,544,528	2,701,959	2,544,528
Operating Segments | WMG
Reportable segments and reconciliation to consolidated results [Abstract]
Interest and dividend income		0	0	0	0
Interest expense		0	0	0	0
Net interest income		0	0	0	0
Provision for credit losses		0	0	0	0
Net interest income after provision for credit losses		0	0	0	0
Other non-interest income		2,533	2,403	7,716	7,788
Legal accruals and settlements			0		0
Other non-interest expenses		1,796	1,715	5,293	5,180
Income (loss) before income tax expense (benefit)		737	688	2,423	2,608
Income tax expense (benefit)		161	167	536	605
Segment net income (loss)		576	521	1,887	2,003
Assets		2,596	2,804	2,596	2,804
Intersegment Eliminations
Reportable segments and reconciliation to consolidated results [Abstract]
Interest and dividend income		36	16	102	30
Interest expense		0	0	0	0
Net interest income		36	16	102	30
Provision for credit losses		0	0	0	0
Net interest income after provision for credit losses		36	16	102	30
Other non-interest income		273	216	608	678
Legal accruals and settlements			0		0
Other non-interest expenses		275	303	937	1,091
Income (loss) before income tax expense (benefit)		34	(71)	(227)	(383)
Income tax expense (benefit)		(9)	(16)	(91)	(99)
Segment net income (loss)		43	(55)	(136)	(284)
Assets		$ 3,279	$ 4,090	$ 3,279	$ 4,090

[1] Effective January 1, 2023, the allowance calculation is based upon Current Expected Credit loss methodology. Prior to January 1, 2023, the allowance calculation was based upon incurred loss methodology. Refer to Note 1 for further discussion.