ALLOWANCE FOR CREDIT LOSSES - Changes in the Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance at beginning of year	$ 144,274	$ 141,591	$ 141,433	$ 132,977
Provision for Credit Losses-loans and leases	16,157	12,719	29,576	21,363
Loans charged off	(5,035)	(6,940)	(16,172)	(9,581)
Recoveries	789	1,276	1,348	3,887
Total net charge-offs	(4,246)	(5,664)	(14,824)	(5,694)
Balance at end of year	156,185	148,646	156,185	148,646
Commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance at beginning of year	46,019	45,905	44,319	42,313
Provision for Credit Losses-loans and leases	5,206	(1,537)	9,439	2,676
Loans charged off	(2,149)	(2,372)	(4,844)	(3,102)
Recoveries	236	631	398	740
Total net charge-offs	(1,913)	(1,741)	(4,446)	(2,362)
Balance at end of year	49,312	42,627	49,312	42,627
Lease financing
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance at beginning of year	11,903	3,950	12,365	3,571
Provision for Credit Losses-loans and leases	2,205	4,208	1,687	4,599
Loans charged off	(190)	(90)	(193)	(103)
Recoveries	1	1	60	2
Total net charge-offs	(189)	(89)	(133)	(101)
Balance at end of year	13,919	8,069	13,919	8,069
Construction real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance at beginning of year	13,337	13,646	11,003	13,527
Provision for Credit Losses-loans and leases	6,341	(1,868)	8,675	(1,749)
Loans charged off	0	0	0	0
Recoveries	0	0	0	0
Total net charge-offs	0	0	0	0
Balance at end of year	19,678	11,778	19,678	11,778
Commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance at beginning of year	34,411	42,020	34,903	41,106
Provision for Credit Losses-loans and leases	(524)	4,926	4,265	3,668
Loans charged off	(2)	(2,648)	(5,321)	(2,714)
Recoveries	137	153	175	2,391
Total net charge-offs	135	(2,495)	(5,146)	(323)
Balance at end of year	34,022	44,451	34,022	44,451
Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance at beginning of year	17,717	15,536	18,088	12,684
Provision for Credit Losses-loans and leases	667	3,776	337	6,562
Loans charged off	(6)	(20)	(71)	(20)
Recoveries	37	113	61	179
Total net charge-offs	31	93	(10)	159
Balance at end of year	18,415	19,405	18,415	19,405
Home equity
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance at beginning of year	12,997	13,380	13,322	12,447
Provision for Credit Losses-loans and leases	897	1,476	517	2,420
Loans charged off	(122)	(21)	(147)	(112)
Recoveries	118	232	198	312
Total net charge-offs	(4)	211	51	200
Balance at end of year	13,890	15,067	13,890	15,067
Installment
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance at beginning of year	5,420	4,693	4,888	4,945
Provision for Credit Losses-loans and leases	1,323	1,198	3,946	2,416
Loans charged off	(2,034)	(1,515)	(4,270)	(3,039)
Recoveries	219	90	364	144
Total net charge-offs	(1,815)	(1,425)	(3,906)	(2,895)
Balance at end of year	4,928	4,466	4,928	4,466
Credit card
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance at beginning of year	2,470	2,461	2,545	2,384
Provision for Credit Losses-loans and leases	42	540	710	771
Loans charged off	(532)	(274)	(1,326)	(491)
Recoveries	41	56	92	119
Total net charge-offs	491	218	1,234	372
Balance at end of year	$ 2,021	$ 2,783	$ 2,021	$ 2,783