ALLOWANCE FOR CREDIT LOSSES AND RESERVE FOR OFF-BALANCE SHEET CREDIT EXPOSURES (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Changes in the allowance
Beginning balance	$ 60,469	$ 63,532	$ 59,182	$ 63,934
Provision (credit) for credit losses on loans	3,810	2,448	7,715	6,569
Gross charge-offs	(5,722)	(5,148)	(9,279)	(10,668)
Gross recoveries	1,054	1,393	1,993	2,390
Net (charge-offs) recoveries	(4,668)	(3,755)	(7,286)	(8,278)
Ending balance	59,611	62,225	59,611	62,225
Commercial and Industrial
Changes in the allowance
Beginning balance	7,423	7,008	7,113	7,181
Provision (credit) for credit losses on loans	2,480	452	3,199	871
Gross charge-offs	(2,858)	(519)	(3,438)	(1,201)
Gross recoveries	195	130	366	220
Net (charge-offs) recoveries	(2,663)	(389)	(3,072)	(981)
Ending balance	7,240	7,071	7,240	7,071
Consumer
Changes in the allowance
Beginning balance	13,497	16,142	13,269	17,079
Provision (credit) for credit losses on loans	2,343	1,750	4,793	4,758
Gross charge-offs	(2,864)	(4,345)	(5,841)	(9,183)
Gross recoveries	840	1,254	1,595	2,147
Net (charge-offs) recoveries	(2,024)	(3,091)	(4,246)	(7,036)
Ending balance	13,816	14,801	13,816	14,801
Construction \| Real Estate
Changes in the allowance
Beginning balance	2,282	3,619	2,316	4,004
Provision (credit) for credit losses on loans	1,078	179	1,044	(206)
Gross charge-offs	0	0	0	0
Gross recoveries	3	0	3	0
Net (charge-offs) recoveries	3	0	3	0
Ending balance	3,363	3,798	3,363	3,798
Residential Mortgage \| Real Estate
Changes in the allowance
Beginning balance	15,936	16,026	15,267	14,626
Provision (credit) for credit losses on loans	(2,065)	(362)	(1,406)	1,030
Gross charge-offs	0	(284)	0	(284)
Gross recoveries	7	9	17	17
Net (charge-offs) recoveries	7	(275)	17	(267)
Ending balance	13,878	15,389	13,878	15,389
Home Equity \| Real Estate
Changes in the allowance
Beginning balance	1,808	3,733	2,335	3,501
Provision (credit) for credit losses on loans	(768)	96	(1,298)	322
Gross charge-offs	0	0	0	0
Gross recoveries	9	0	12	6
Net (charge-offs) recoveries	9	0	12	6
Ending balance	1,049	3,829	1,049	3,829
Commercial Mortgage \| Real Estate
Changes in the allowance
Beginning balance	19,523	17,004	18,882	17,543
Provision (credit) for credit losses on loans	742	333	1,383	(206)
Gross charge-offs	0	0	0	0
Gross recoveries	0	0	0	0
Net (charge-offs) recoveries	0	0	0	0
Ending balance	$ 20,265	$ 17,337	$ 20,265	$ 17,337

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

+ Details

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

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- Definition

Amount, excluding accrued interest, of decrease (increase) in allowance for credit loss on financing receivable from writeoff (recovery). Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

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- Definition

Amount, excluding accrued interest, of credit loss expense (reversal of expense) on financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

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