ALLOWANCE FOR CREDIT LOSSES AND RESERVE FOR OFF-BALANCE SHEET CREDIT EXPOSURES (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Changes in the allowance
Beginning balance	$ 60,581	$ 59,611	$ 59,621	$ 59,182
Provision (credit) for credit losses on loans	1,929	3,440	7,957	11,155
Gross charge-offs	(3,551)	(3,895)	(10,567)	(13,174)
Gross recoveries	882	1,237	2,830	3,230
Net (charge-offs) recoveries	(2,669)	(2,658)	(7,737)	(9,944)
Ending balance	59,841	60,393	59,841	60,393
Commercial and Industrial
Changes in the allowance
Beginning balance	8,165	7,240	7,982	7,113
Provision (credit) for credit losses on loans	120	516	2,339	3,715
Gross charge-offs	(885)	(1,071)	(3,294)	(4,509)
Gross recoveries	284	204	657	570
Net (charge-offs) recoveries	(601)	(867)	(2,637)	(3,939)
Ending balance	7,684	6,889	7,684	6,889
Real Estate Portfolio Segment
Changes in the allowance
Gross charge-offs			(23)
Consumer
Changes in the allowance
Beginning balance	12,577	13,816	12,819	13,269
Provision (credit) for credit losses on loans	2,270	1,614	5,069	6,407
Gross charge-offs	(2,666)	(2,824)	(7,250)	(8,665)
Gross recoveries	586	1,016	2,129	2,611
Net (charge-offs) recoveries	(2,080)	(1,808)	(5,121)	(6,054)
Ending balance	12,767	13,622	12,767	13,622
Construction \| Real Estate Portfolio Segment
Changes in the allowance
Beginning balance	4,319	3,363	3,815	2,316
Provision (credit) for credit losses on loans	(222)	603	280	1,647
Gross charge-offs	0	0	0	0
Gross recoveries	0	0	2	3
Net (charge-offs) recoveries	0	0	2	3
Ending balance	4,097	3,966	4,097	3,966
Residential Mortgage \| Real Estate Portfolio Segment
Changes in the allowance
Beginning balance	13,092	13,878	14,219	15,267
Provision (credit) for credit losses on loans	(10)	303	(1,132)	(1,103)
Gross charge-offs	0	0	(23)	0
Gross recoveries	9	8	27	25
Net (charge-offs) recoveries	9	8	4	25
Ending balance	13,091	14,189	13,091	14,189
Home Equity \| Real Estate Portfolio Segment
Changes in the allowance
Beginning balance	1,075	1,049	1,242	2,335
Provision (credit) for credit losses on loans	11	105	(168)	(1,193)
Gross charge-offs	0	0	0	0
Gross recoveries	3	9	15	21
Net (charge-offs) recoveries	3	9	15	21
Ending balance	1,089	1,163	1,089	1,163
Commercial Mortgage \| Real Estate Portfolio Segment
Changes in the allowance
Beginning balance	21,353	20,265	19,544	18,882
Provision (credit) for credit losses on loans	(240)	299	1,569	1,682
Gross charge-offs	0	0	0	0
Gross recoveries	0	0	0	0
Net (charge-offs) recoveries	0	0	0	0
Ending balance	$ 21,113	$ 20,564	$ 21,113	$ 20,564

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/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477657/942-210-S45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478478/942-210-S50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

Reference 4: 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

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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
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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 13
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

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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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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
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-Section 50
-Paragraph 13
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

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