ALLOWANCE FOR CREDIT LOSSES AND CREDIT QUALITY INFORMATION - Credit Quality Indicators (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans	$ 11,909,436	$ 7,882,055	$ 9,014,677
Commercial | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	1,184,837	605,339
Year two, originated, fiscal year before current fiscal year	545,612	436,055
Year three, originated, two years before current fiscal year	401,753	386,061
Year four, originated, three years before current fiscal year	258,295	303,448
Year five, originated, four years before current fiscal year	191,193	159,343
Prior	284,366	171,029
Revolving loans amortized cost basis	8,099	5,580
Revolving loans converted to term	260,171	203,464
Total Loans	3,134,326	2,270,319	2,949,303
Gross loans	2,575,345	1,918,043
Commercial | Commercial and industrial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	1,123,803	556,896
Year two, originated, fiscal year before current fiscal year	501,761	420,698
Year three, originated, two years before current fiscal year	387,225	329,354
Year four, originated, three years before current fiscal year	211,310	273,345
Year five, originated, four years before current fiscal year	153,713	139,800
Prior	276,588	148,809
Revolving loans amortized cost basis	8,099	5,551
Revolving loans converted to term	250,486	176,006
Total Loans	2,912,985	2,050,459
Commercial | Commercial and industrial | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	28,672	35,910
Year two, originated, fiscal year before current fiscal year	27,689	949
Year three, originated, two years before current fiscal year	7,585	3,052
Year four, originated, three years before current fiscal year	9,451	1,057
Year five, originated, four years before current fiscal year	347	429
Prior	1,010	15,299
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	2,596	17,545
Total Loans	77,350	74,241
Commercial | Commercial and industrial | Substandard or Lower
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	32,362	12,533
Year two, originated, fiscal year before current fiscal year	16,162	14,408
Year three, originated, two years before current fiscal year	6,943	53,655
Year four, originated, three years before current fiscal year	37,534	29,046
Year five, originated, four years before current fiscal year	37,133	19,114
Prior	6,768	6,921
Revolving loans amortized cost basis	0	29
Revolving loans converted to term	7,089	9,913
Total Loans	143,991	145,619
Commercial | Owner-occupied commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	301,255	309,286
Year two, originated, fiscal year before current fiscal year	326,888	208,223
Year three, originated, two years before current fiscal year	281,461	179,202
Year four, originated, three years before current fiscal year	231,118	77,835
Year five, originated, four years before current fiscal year	118,254	142,277
Prior	400,897	280,687
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	149,709	144,197
Total Loans	1,809,582	1,341,707	1,332,727
Gross loans	1,809,582	1,341,707
Commercial | Owner-occupied commercial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	280,898	305,156
Year two, originated, fiscal year before current fiscal year	325,388	189,128
Year three, originated, two years before current fiscal year	258,177	172,503
Year four, originated, three years before current fiscal year	226,717	67,526
Year five, originated, four years before current fiscal year	106,390	136,697
Prior	363,420	262,629
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	132,942	128,188
Total Loans	1,693,932	1,261,827
Commercial | Owner-occupied commercial | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	17,376	938
Year two, originated, fiscal year before current fiscal year	0	5,359
Year three, originated, two years before current fiscal year	0	2,561
Year four, originated, three years before current fiscal year	0	891
Year five, originated, four years before current fiscal year	0	0
Prior	2,166	7,019
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	3,351	10,543
Total Loans	22,893	27,311
Commercial | Owner-occupied commercial | Substandard or Lower
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	2,981	3,192
Year two, originated, fiscal year before current fiscal year	1,500	13,736
Year three, originated, two years before current fiscal year	23,284	4,138
Year four, originated, three years before current fiscal year	4,401	9,418
Year five, originated, four years before current fiscal year	11,864	5,580
Prior	35,311	11,039
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	13,416	5,466
Total Loans	92,757	52,569
Commercial | Commercial mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	520,094	418,587
Year two, originated, fiscal year before current fiscal year	601,511	286,698
Year three, originated, two years before current fiscal year	542,712	221,100
Year four, originated, three years before current fiscal year	558,818	137,452
Year five, originated, four years before current fiscal year	289,583	243,705
Prior	627,247	383,997
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	211,119	189,971
Total Loans	3,351,084	1,881,510	2,086,062
Gross loans	3,351,084	1,881,510
Commercial | Commercial mortgages | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	516,783	416,149
Year two, originated, fiscal year before current fiscal year	600,226	280,889
Year three, originated, two years before current fiscal year	526,312	217,311
Year four, originated, three years before current fiscal year	549,788	134,477
Year five, originated, four years before current fiscal year	276,414	229,863
Prior	594,024	368,527
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	210,550	187,396
Total Loans	3,274,097	1,834,612
Commercial | Commercial mortgages | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	1,450	0
Year two, originated, fiscal year before current fiscal year	75	4,185
Year three, originated, two years before current fiscal year	3,848	0
Year four, originated, three years before current fiscal year	6,121	861
Year five, originated, four years before current fiscal year	9,596	11,588
Prior	32,014	1,385
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	2,097
Total Loans	53,104	20,116
Commercial | Commercial mortgages | Substandard or Lower
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	1,861	2,438
Year two, originated, fiscal year before current fiscal year	1,210	1,624
Year three, originated, two years before current fiscal year	12,552	3,789
Year four, originated, three years before current fiscal year	2,909	2,114
Year five, originated, four years before current fiscal year	3,573	2,254
Prior	1,209	14,085
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	569	478
Total Loans	23,883	26,782
Commercial | Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	448,581	260,975
Year two, originated, fiscal year before current fiscal year	303,819	195,269
Year three, originated, two years before current fiscal year	124,597	87,290
Year four, originated, three years before current fiscal year	9,502	39,585
Year five, originated, four years before current fiscal year	26,553	2,313
Prior	7,539	11,297
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	123,458	90,484
Total Loans	1,044,049	687,213	716,275
Gross loans	1,044,049	687,213
Commercial | Construction | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	448,581	248,053
Year two, originated, fiscal year before current fiscal year	299,619	195,269
Year three, originated, two years before current fiscal year	115,667	84,868
Year four, originated, three years before current fiscal year	9,319	39,585
Year five, originated, four years before current fiscal year	26,553	2,223
Prior	7,539	11,297
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	122,116	88,839
Total Loans	1,029,394	670,134
Commercial | Construction | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	0	0
Year two, originated, fiscal year before current fiscal year	0	0
Year three, originated, two years before current fiscal year	0	0
Year four, originated, three years before current fiscal year	0	0
Year five, originated, four years before current fiscal year	0	0
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	581	0
Total Loans	581	0
Commercial | Construction | Substandard or Lower
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	0	12,922
Year two, originated, fiscal year before current fiscal year	4,200	0
Year three, originated, two years before current fiscal year	8,930	2,422
Year four, originated, three years before current fiscal year	183	0
Year five, originated, four years before current fiscal year	0	90
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	761	1,645
Total Loans	14,074	17,079
Commercial | Paycheck Protection Program, CARES Act
Financing Receivable, Credit Quality Indicator [Line Items]
Gross loans	3,800	31,500
Residential
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	64,500	59,977
Year two, originated, fiscal year before current fiscal year	111,237	28,538
Year three, originated, two years before current fiscal year	61,127	13,570
Year four, originated, three years before current fiscal year	37,117	32,871
Year five, originated, four years before current fiscal year	47,077	45,032
Prior	438,407	362,745
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Total Loans	759,465	542,733	764,393
Gross loans	761,882	546,667
Residential | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	64,500	59,977
Year two, originated, fiscal year before current fiscal year	110,508	28,426
Year three, originated, two years before current fiscal year	60,625	12,526
Year four, originated, three years before current fiscal year	36,118	32,871
Year five, originated, four years before current fiscal year	45,859	44,969
Prior	434,175	358,964
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Total Loans	751,785	537,733
Residential | Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	0	0
Year two, originated, fiscal year before current fiscal year	729	112
Year three, originated, two years before current fiscal year	502	1,044
Year four, originated, three years before current fiscal year	999	0
Year five, originated, four years before current fiscal year	1,218	63
Prior	4,232	3,781
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Total Loans	7,680	5,000
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	595,158	219,918
Year two, originated, fiscal year before current fiscal year	195,397	170,069
Year three, originated, two years before current fiscal year	126,806	74,048
Year four, originated, three years before current fiscal year	54,449	204,119
Year five, originated, four years before current fiscal year	220,518	39,184
Prior	71,478	60,952
Revolving loans amortized cost basis	541,563	384,373
Revolving loans converted to term	5,561	5,910
Total Loans	1,810,930	1,158,573	$ 1,165,917
Gross loans	1,810,930	1,158,573
Consumer | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	595,158	219,918
Year two, originated, fiscal year before current fiscal year	195,397	169,922
Year three, originated, two years before current fiscal year	126,456	74,048
Year four, originated, three years before current fiscal year	54,449	203,519
Year five, originated, four years before current fiscal year	220,039	39,113
Prior	71,478	60,952
Revolving loans amortized cost basis	540,308	382,718
Revolving loans converted to term	5,232	5,364
Total Loans	1,808,517	1,155,554
Consumer | Nonperforming
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	0	0
Year two, originated, fiscal year before current fiscal year	0	147
Year three, originated, two years before current fiscal year	350	0
Year four, originated, three years before current fiscal year	0	600
Year five, originated, four years before current fiscal year	479	71
Prior	0	0
Revolving loans amortized cost basis	1,255	1,655
Revolving loans converted to term	329	546
Total Loans	$ 2,413	$ 3,019