ALLOWANCE FOR CREDIT LOSSES AND RESERVE FOR OFF-BALANCE SHEET CREDIT EXPOSURES (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Changes in the allowance
Beginning balance	$ 59,933	$ 60,469	$ 59,621	$ 59,182
Provision (credit) for credit losses on loans	3,304	3,810	6,028	7,715
Gross charge-offs	(3,659)	(5,722)	(7,016)	(9,279)
Gross recoveries	1,003	1,054	1,948	1,993
Net (charge-offs) recoveries	(2,656)	(4,668)	(5,068)	(7,286)
Ending balance	60,581	59,611	60,581	59,611
Commercial and Industrial
Changes in the allowance
Beginning balance	7,620	7,423	7,982	7,113
Provision (credit) for credit losses on loans	1,700	2,480	2,219	3,199
Gross charge-offs	(1,353)	(2,858)	(2,409)	(3,438)
Gross recoveries	198	195	373	366
Net (charge-offs) recoveries	(1,155)	(2,663)	(2,036)	(3,072)
Ending balance	8,165	7,240	8,165	7,240
Real Estate Portfolio Segment
Changes in the allowance
Gross charge-offs			(23)
Consumer
Changes in the allowance
Beginning balance	12,822	13,497	12,819	13,269
Provision (credit) for credit losses on loans	1,249	2,343	2,799	4,793
Gross charge-offs	(2,283)	(2,864)	(4,584)	(5,841)
Gross recoveries	789	840	1,543	1,595
Net (charge-offs) recoveries	(1,494)	(2,024)	(3,041)	(4,246)
Ending balance	12,577	13,816	12,577	13,816
Construction \| Real Estate Portfolio Segment
Changes in the allowance
Beginning balance	3,827	2,282	3,815	2,316
Provision (credit) for credit losses on loans	492	1,078	502	1,044
Gross charge-offs	0	0	0	0
Gross recoveries	0	3	2	3
Net (charge-offs) recoveries	0	3	2	3
Ending balance	4,319	3,363	4,319	3,363
Residential Mortgage \| Real Estate Portfolio Segment
Changes in the allowance
Beginning balance	14,211	15,936	14,219	15,267
Provision (credit) for credit losses on loans	(1,106)	(2,065)	(1,122)	(1,406)
Gross charge-offs	(23)	0	(23)	0
Gross recoveries	10	7	18	17
Net (charge-offs) recoveries	(13)	7	(5)	17
Ending balance	13,092	13,878	13,092	13,878
Home Equity \| Real Estate Portfolio Segment
Changes in the allowance
Beginning balance	1,410	1,808	1,242	2,335
Provision (credit) for credit losses on loans	(341)	(768)	(179)	(1,298)
Gross charge-offs	0	0	0	0
Gross recoveries	6	9	12	12
Net (charge-offs) recoveries	6	9	12	12
Ending balance	1,075	1,049	1,075	1,049
Commercial Mortgage \| Real Estate Portfolio Segment
Changes in the allowance
Beginning balance	20,043	19,523	19,544	18,882
Provision (credit) for credit losses on loans	1,310	742	1,809	1,383
Gross charge-offs	0	0	0	0
Gross recoveries	0	0	0	0
Net (charge-offs) recoveries	0	0	0	0
Ending balance	$ 21,353	$ 20,265	$ 21,353	$ 20,265

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
-Subparagraph (SX 210.9-03(7)(2))
-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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- 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
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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 13
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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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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-Publisher FASB
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