ALLOWANCE FOR CREDIT LOSSES AND RESERVE FOR OFF-BALANCE SHEET CREDIT EXPOSURES (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Changes in the allowance
Beginning balance	$ 59,182	$ 63,934	$ 63,738
Provision (credit) for credit losses on loans	12,840	10,962	15,235
Subtotal	72,022	74,896	78,973
Charge-offs	16,683	20,226	19,207
Recoveries	(4,282)	(4,512)	(4,168)
Net charge-offs (recoveries)	12,401	15,714	15,039
Ending balance	59,621	59,182	63,934
Commercial and industrial:
Changes in the allowance
Beginning balance	7,113	7,181	6,824
Provision (credit) for credit losses on loans	5,220	2,373	1,599
Subtotal	12,333	9,554	8,423
Charge-offs	5,187	2,977	1,962
Recoveries	(836)	(536)	(720)
Net charge-offs (recoveries)	4,351	2,441	1,242
Ending balance	7,982	7,113	7,181
Commercial and industrial: \| Other
Changes in the allowance
Charge-offs	5,187	2,977
Real Estate \| Construction
Changes in the allowance
Beginning balance	2,316	4,004	2,867
Provision (credit) for credit losses on loans	1,495	(1,688)	1,136
Subtotal	3,811	2,316	4,003
Charge-offs	0	0	0
Recoveries	(4)	0	(1)
Net charge-offs (recoveries)	(4)	0	(1)
Ending balance	3,815	2,316	4,004
Real Estate \| Residential mortgage
Changes in the allowance
Beginning balance	15,267	14,626	11,804
Provision (credit) for credit losses on loans	(1,082)	988	2,745
Subtotal	14,185	15,614	14,549
Charge-offs	0	383	0
Recoveries	(34)	(36)	(77)
Net charge-offs (recoveries)	(34)	347	(77)
Ending balance	14,219	15,267	14,626
Real Estate \| Home equity
Changes in the allowance
Beginning balance	2,335	3,501	4,114
Provision (credit) for credit losses on loans	(1,123)	(1,172)	(670)
Subtotal	1,212	2,329	3,444
Charge-offs	0	0	0
Recoveries	(30)	(6)	(57)
Net charge-offs (recoveries)	(30)	(6)	(57)
Ending balance	1,242	2,335	3,501
Real Estate \| Commercial mortgage
Changes in the allowance
Beginning balance	18,882	17,543	17,902
Provision (credit) for credit losses on loans	662	1,339	(359)
Subtotal	19,544	18,882	17,543
Charge-offs	0	0	0
Recoveries	0	0	0
Net charge-offs (recoveries)	0	0	0
Ending balance	19,544	18,882	17,543
Consumer \| Consumer
Changes in the allowance
Beginning balance	13,269	17,079	20,227
Provision (credit) for credit losses on loans	7,668	9,122	10,784
Subtotal	20,937	26,201	31,011
Charge-offs	11,496	16,866	17,245
Recoveries	(3,378)	(3,934)	(3,313)
Net charge-offs (recoveries)	8,118	12,932	13,932
Ending balance	$ 12,819	$ 13,269	$ 17,079

Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Net Charge-offs

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- Definition

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

+ References

No definition available.

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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

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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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