ALLOWANCE FOR CREDIT LOSSES AND CREDIT QUALITY INFORMATION - Credit Quality Indicators (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans	$ 13,187,874	$ 12,766,518	$ 11,909,436
Total charge offs	65,123	66,007	27,470
Commercial | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	749,866	797,050
Year two, originated, fiscal year before current fiscal year	571,748	556,818
Year three, originated, two years before current fiscal year	369,477	189,098
Year four, originated, three years before current fiscal year	131,936	221,838
Year five, originated, four years before current fiscal year	179,216	113,303
Prior	339,837	402,258
Revolving loans amortized cost basis	8,771	8,785
Revolving loans converted to term	305,323	250,920
Total Loans	2,656,174	2,540,070	2,575,345
Year one, current fiscal year charge offs	102	0
Year two, current fiscal year charge offs	1,303	568
Year three, current fiscal year charge offs	4,276	5,214
Year four, current fiscal year charge offs	706	1,747
Year five, current fiscal year charge offs	275	7,567
Prior to year 5, charge offs	8,828	11,557
Revolving loans amortized cost basis charge offs	0	0
Revolving loans converted to term gross charge offs	0	0
Total charge offs	15,490	26,653	12,500
Commercial | Commercial and industrial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	662,723	716,848
Year two, originated, fiscal year before current fiscal year	542,655	490,934
Year three, originated, two years before current fiscal year	345,370	180,343
Year four, originated, three years before current fiscal year	126,173	211,151
Year five, originated, four years before current fiscal year	155,137	90,522
Prior	309,445	383,609
Revolving loans amortized cost basis	8,744	8,785
Revolving loans converted to term	252,524	237,786
Total Loans	2,402,771	2,319,978
Commercial | Commercial and industrial | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	18,861	7,209
Year two, originated, fiscal year before current fiscal year	386	11,860
Year three, originated, two years before current fiscal year	4,147	2,804
Year four, originated, three years before current fiscal year	1,176	463
Year five, originated, four years before current fiscal year	2,490	735
Prior	607	743
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	1,868	1,649
Total Loans	29,535	25,463
Commercial | Commercial and industrial | Substandard or Lower
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	68,282	72,993
Year two, originated, fiscal year before current fiscal year	28,707	54,024
Year three, originated, two years before current fiscal year	19,960	5,951
Year four, originated, three years before current fiscal year	4,587	10,224
Year five, originated, four years before current fiscal year	21,589	22,046
Prior	29,785	17,906
Revolving loans amortized cost basis	27	0
Revolving loans converted to term	50,931	11,485
Total Loans	223,868	194,629
Commercial | Owner-occupied commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	288,647	350,789
Year two, originated, fiscal year before current fiscal year	305,383	286,875
Year three, originated, two years before current fiscal year	247,208	267,790
Year four, originated, three years before current fiscal year	233,971	220,257
Year five, originated, four years before current fiscal year	198,395	213,174
Prior	445,559	354,690
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	254,482	192,512
Total Loans	1,973,645	1,886,087	1,809,582
Year one, current fiscal year charge offs	0	0
Year two, current fiscal year charge offs	114	0
Year three, current fiscal year charge offs	0	0
Year four, current fiscal year charge offs	0	0
Year five, current fiscal year charge offs	0	184
Prior to year 5, charge offs	63	0
Revolving loans amortized cost basis charge offs	0	0
Revolving loans converted to term gross charge offs	0	0
Total charge offs	177	184	179
Commercial | Owner-occupied commercial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	285,146	346,908
Year two, originated, fiscal year before current fiscal year	296,339	264,895
Year three, originated, two years before current fiscal year	224,797	251,262
Year four, originated, three years before current fiscal year	225,086	212,365
Year five, originated, four years before current fiscal year	168,368	194,153
Prior	404,515	313,801
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	238,356	178,150
Total Loans	1,842,607	1,761,534
Commercial | Owner-occupied commercial | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	0	2,885
Year two, originated, fiscal year before current fiscal year	0	3,115
Year three, originated, two years before current fiscal year	498	5,419
Year four, originated, three years before current fiscal year	0	1,105
Year five, originated, four years before current fiscal year	25,220	11,002
Prior	0	5,559
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	756	1,393
Total Loans	26,474	30,478
Commercial | Owner-occupied commercial | Substandard or Lower
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	3,501	996
Year two, originated, fiscal year before current fiscal year	9,044	18,865
Year three, originated, two years before current fiscal year	21,913	11,109
Year four, originated, three years before current fiscal year	8,885	6,787
Year five, originated, four years before current fiscal year	4,807	8,019
Prior	41,044	35,330
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	15,370	12,969
Total Loans	104,564	94,075
Commercial | Commercial mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	605,582	877,631
Year two, originated, fiscal year before current fiscal year	768,096	466,048
Year three, originated, two years before current fiscal year	412,786	527,394
Year four, originated, three years before current fiscal year	418,585	481,028
Year five, originated, four years before current fiscal year	402,873	511,873
Prior	879,045	631,660
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	543,660	305,546
Total Loans	4,030,627	3,801,180	3,351,084
Year one, current fiscal year charge offs	0	0
Year two, current fiscal year charge offs	62	83
Year three, current fiscal year charge offs	0	0
Year four, current fiscal year charge offs	0	217
Year five, current fiscal year charge offs	97	0
Prior to year 5, charge offs	5,590	0
Revolving loans amortized cost basis charge offs	0	0
Revolving loans converted to term gross charge offs	0	0
Total charge offs	5,749	300	581
Commercial | Commercial mortgages | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	546,404	847,137
Year two, originated, fiscal year before current fiscal year	740,711	464,895
Year three, originated, two years before current fiscal year	396,458	526,280
Year four, originated, three years before current fiscal year	414,546	465,354
Year five, originated, four years before current fiscal year	379,637	486,855
Prior	858,744	619,448
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	506,394	290,083
Total Loans	3,842,894	3,700,052
Commercial | Commercial mortgages | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	15,606	20,632
Year two, originated, fiscal year before current fiscal year	3,389	0
Year three, originated, two years before current fiscal year	0	67
Year four, originated, three years before current fiscal year	1,962	1,837
Year five, originated, four years before current fiscal year	2,356	10,666
Prior	2,136	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	36,738	0
Total Loans	62,187	33,202
Commercial | Commercial mortgages | Substandard or Lower
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	43,572	9,862
Year two, originated, fiscal year before current fiscal year	23,996	1,153
Year three, originated, two years before current fiscal year	16,328	1,047
Year four, originated, three years before current fiscal year	2,077	13,837
Year five, originated, four years before current fiscal year	20,880	14,352
Prior	18,165	12,212
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	528	15,463
Total Loans	125,546	67,926
Commercial | Construction
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	338,122	463,471
Year two, originated, fiscal year before current fiscal year	277,130	339,727
Year three, originated, two years before current fiscal year	182,296	122,868
Year four, originated, three years before current fiscal year	3,903	11,628
Year five, originated, four years before current fiscal year	87	2,522
Prior	3,319	7,016
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	27,236	88,298
Total Loans	832,093	1,035,530	1,044,049
Year one, current fiscal year charge offs	0	0
Year two, current fiscal year charge offs	0	0
Year three, current fiscal year charge offs	0	794
Year four, current fiscal year charge offs	0	0
Year five, current fiscal year charge offs	0	0
Prior to year 5, charge offs	0	0
Revolving loans amortized cost basis charge offs	0	0
Revolving loans converted to term gross charge offs	0	0
Total charge offs	0	794	0
Commercial | Construction | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	318,363	429,055
Year two, originated, fiscal year before current fiscal year	277,130	319,958
Year three, originated, two years before current fiscal year	161,517	111,333
Year four, originated, three years before current fiscal year	3,112	3,030
Year five, originated, four years before current fiscal year	87	388
Prior	3,319	7,016
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	22,416	87,741
Total Loans	785,944	958,521
Commercial | Construction | Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	0	28,718
Year two, originated, fiscal year before current fiscal year	0	19,769
Year three, originated, two years before current fiscal year	0	8,227
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	0	0
Total Loans	0	56,714
Commercial | Construction | Substandard or Lower
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	19,759	5,698
Year two, originated, fiscal year before current fiscal year	0	0
Year three, originated, two years before current fiscal year	20,779	3,308
Year four, originated, three years before current fiscal year	791	8,598
Year five, originated, four years before current fiscal year	0	2,134
Prior	0	0
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	4,820	557
Total Loans	46,149	20,295
Commercial | Commercial small business leases
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	247,583	260,348
Year two, originated, fiscal year before current fiscal year	189,509	191,746
Year three, originated, two years before current fiscal year	121,990	103,428
Year four, originated, three years before current fiscal year	56,998	40,697
Year five, originated, four years before current fiscal year	14,569	15,411
Prior	16,867	11,992
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Total Loans	647,516	623,622	558,981
Year one, current fiscal year charge offs	1,018	1,528
Year two, current fiscal year charge offs	5,442	7,250
Year three, current fiscal year charge offs	8,216	4,447
Year four, current fiscal year charge offs	3,645	1,454
Year five, current fiscal year charge offs	1,235	735
Prior to year 5, charge offs	477	227
Revolving loans amortized cost basis charge offs	0	0
Revolving loans converted to term gross charge offs	0	0
Total charge offs	20,033	15,641	6,504
Commercial | Commercial small business leases | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	247,583	260,348
Year two, originated, fiscal year before current fiscal year	189,509	191,746
Year three, originated, two years before current fiscal year	121,990	103,428
Year four, originated, three years before current fiscal year	56,998	40,697
Year five, originated, four years before current fiscal year	14,569	15,411
Prior	16,867	11,992
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Total Loans	647,516	623,622
Commercial | Commercial small business leases | 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	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	0	0
Total Loans	0	0
Residential
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	170,647	188,644
Year two, originated, fiscal year before current fiscal year	177,043	67,528
Year three, originated, two years before current fiscal year	63,193	103,695
Year four, originated, three years before current fiscal year	96,042	57,759
Year five, originated, four years before current fiscal year	50,977	34,750
Prior	403,524	415,519
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Total Loans	961,426	867,895	759,465
Year one, current fiscal year charge offs	0	33
Year two, current fiscal year charge offs	0	0
Year three, current fiscal year charge offs	0	0
Year four, current fiscal year charge offs	0	0
Year five, current fiscal year charge offs	0	0
Prior to year 5, charge offs	125	8
Revolving loans amortized cost basis charge offs	0	0
Revolving loans converted to term gross charge offs	0	0
Total charge offs	125	41	186
Residential | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	170,647	188,644
Year two, originated, fiscal year before current fiscal year	176,923	67,358
Year three, originated, two years before current fiscal year	62,833	102,982
Year four, originated, three years before current fiscal year	92,574	57,273
Year five, originated, four years before current fiscal year	49,994	33,499
Prior	399,981	412,099
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Total Loans	952,952	861,855
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	120	170
Year three, originated, two years before current fiscal year	360	713
Year four, originated, three years before current fiscal year	3,468	486
Year five, originated, four years before current fiscal year	983	1,251
Prior	3,543	3,420
Revolving loans amortized cost basis	0	0
Revolving loans converted to term	0	0
Total Loans	8,474	6,040
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	282,465	391,580
Year two, originated, fiscal year before current fiscal year	350,854	568,919
Year three, originated, two years before current fiscal year	446,797	154,065
Year four, originated, three years before current fiscal year	117,155	104,600
Year five, originated, four years before current fiscal year	85,825	45,172
Prior	229,340	245,879
Revolving loans amortized cost basis	566,536	496,025
Revolving loans converted to term	7,421	5,894
Total Loans	2,086,393	2,012,134	1,810,930
Year one, current fiscal year charge offs	1,282	1,790
Year two, current fiscal year charge offs	3,942	15,227
Year three, current fiscal year charge offs	13,955	4,411
Year four, current fiscal year charge offs	2,837	313
Year five, current fiscal year charge offs	863	198
Prior to year 5, charge offs	670	455
Revolving loans amortized cost basis charge offs	0	0
Revolving loans converted to term gross charge offs	0	0
Total charge offs	23,549	22,394	$ 7,520
Consumer | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Year one, originated, current fiscal year	282,465	391,580
Year two, originated, fiscal year before current fiscal year	350,605	568,919
Year three, originated, two years before current fiscal year	446,701	153,930
Year four, originated, three years before current fiscal year	116,890	104,248
Year five, originated, four years before current fiscal year	85,633	44,996
Prior	229,340	245,849
Revolving loans amortized cost basis	564,839	494,663
Revolving loans converted to term	7,124	5,662
Total Loans	2,083,597	2,009,847
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	249	0
Year three, originated, two years before current fiscal year	96	135
Year four, originated, three years before current fiscal year	265	352
Year five, originated, four years before current fiscal year	192	176
Prior	0	30
Revolving loans amortized cost basis	1,697	1,362
Revolving loans converted to term	297	232
Total Loans	$ 2,796	$ 2,287