ALLOWANCE FOR CREDIT LOSSES - Changes in the Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance at beginning of year	$ 158,522	$ 156,185	$ 156,791	$ 141,433
Provision for Credit Losses-loans and leases	8,612	9,930	26,837	39,506
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	7,676	8,528	26,516	24,700
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	2,458	1,244	4,804	2,592
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff (Recovery)	5,218	7,284	21,712	22,108
Balance at end of year	161,916	158,831	161,916	158,831
Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance at beginning of year	53,395	49,312	49,987	44,319
Provision for Credit Losses-loans and leases	8,968	5,698	25,065	15,137
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	2,165	5,471	15,339	10,315
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	202	434	687	832
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff (Recovery)	1,963	5,037	14,652	9,483
Balance at end of year	60,400	49,973	60,400	49,973
Lease financing
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance at beginning of year	13,907	13,919	13,079	12,365
Provision for Credit Losses-loans and leases	475	1,502	3,323	3,189
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	298	368	2,358	561
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	291	11	331	71
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff (Recovery)	7	357	2,027	490
Balance at end of year	14,375	15,064	14,375	15,064
Construction real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance at beginning of year	18,908	19,678	19,216	11,003
Provision for Credit Losses-loans and leases	(3,034)	1	(3,342)	8,676
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	245	0	245	0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	0	0	0	0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff (Recovery)	245	0	245	0
Balance at end of year	15,629	19,679	15,629	19,679
Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance at beginning of year	34,133	34,022	35,721	34,903
Provision for Credit Losses-loans and leases	2,147	770	465	5,035
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	3,105	261	3,105	5,582
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	1,138	25	1,232	200
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff (Recovery)	1,967	236	1,873	5,382
Balance at end of year	34,313	34,556	34,313	34,556
Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance at beginning of year	17,089	18,415	17,822	18,088
Provision for Credit Losses-loans and leases	(1,567)	163	(2,350)	500
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	0	60	16	131
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	58	22	124	83
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff (Recovery)	(58)	38	(108)	48
Balance at end of year	15,580	18,540	15,580	18,540
Home equity
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance at beginning of year	15,820	13,890	14,774	13,322
Provision for Credit Losses-loans and leases	454	618	1,468	1,135
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	92	90	278	237
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	94	240	312	438
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff (Recovery)	(2)	(150)	(34)	(201)
Balance at end of year	16,276	14,658	16,276	14,658
Installment
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance at beginning of year	2,808	4,928	3,564	4,888
Provision for Credit Losses-loans and leases	385	637	791	4,583
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	1,194	1,510	3,635	5,780
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	609	421	1,888	785
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff (Recovery)	585	1,089	1,747	4,995
Balance at end of year	2,608	4,476	2,608	4,476
Credit card
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance at beginning of year	2,462	2,021	2,628	2,545
Provision for Credit Losses-loans and leases	784	541	1,417	1,251
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff	577	768	1,540	2,094
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Recovery	66	91	230	183
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff (Recovery)	(511)	(677)	(1,310)	(1,911)
Balance at end of year	$ 2,735	$ 1,885	$ 2,735	$ 1,885

Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

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