ALLOWANCE FOR CREDIT LOSSES AND RESERVE FOR OFF-BALANCE SHEET CREDIT EXPOSURES (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Changes in the allowance
Beginning balance	$ 63,934	$ 63,738	$ 68,097
Provision (credit) for credit losses on loans	10,962	15,235	288
Subtotal	74,896	78,973	68,385
Charge-offs	20,226	19,207	8,368
Recoveries	4,512	4,168	3,721
Net charge-offs (recoveries)	15,714	15,039	4,647
Ending balance	59,182	63,934	63,738
Commercial and industrial:
Changes in the allowance
Beginning balance	7,181	6,824	10,391
Provision (credit) for credit losses on loans	2,373	1,599	(2,593)
Subtotal	9,554	8,423	7,798
Charge-offs	2,977	1,962	1,969
Recoveries	536	720	995
Net charge-offs (recoveries)	2,441	1,242	974
Ending balance	7,113	7,181	6,824
Commercial and industrial: \| Other
Changes in the allowance
Charge-offs	2,977	1,962
Real Estate \| Construction
Changes in the allowance
Beginning balance	4,004	2,867	3,908
Provision (credit) for credit losses on loans	(1,688)	1,136	(1,117)
Subtotal	2,316	4,003	2,791
Charge-offs	0	0	0
Recoveries	0	1	76
Net charge-offs (recoveries)	0	(1)	(76)
Ending balance	2,316	4,004	2,867
Real Estate \| Residential mortgage
Changes in the allowance
Beginning balance	14,626	11,804	12,463
Provision (credit) for credit losses on loans	988	2,745	(954)
Subtotal	15,614	14,549	11,509
Charge-offs	383	0	0
Recoveries	36	77	295
Net charge-offs (recoveries)	347	(77)	(295)
Ending balance	15,267	14,626	11,804
Real Estate \| Home equity
Changes in the allowance
Beginning balance	3,501	4,114	4,509
Provision (credit) for credit losses on loans	(1,172)	(670)	(431)
Subtotal	2,329	3,444	4,078
Charge-offs	0	0	0
Recoveries	6	57	36
Net charge-offs (recoveries)	(6)	(57)	(36)
Ending balance	2,335	3,501	4,114
Real Estate \| Commercial mortgage
Changes in the allowance
Beginning balance	17,543	17,902	18,411
Provision (credit) for credit losses on loans	1,339	(359)	(509)
Subtotal	18,882	17,543	17,902
Charge-offs	0	0	0
Recoveries	0	0	0
Net charge-offs (recoveries)	0	0	0
Ending balance	18,882	17,543	17,902
Consumer \| Consumer
Changes in the allowance
Beginning balance	17,079	20,227	18,415
Provision (credit) for credit losses on loans	9,122	10,784	5,892
Subtotal	26,201	31,011	24,307
Charge-offs	16,866	17,245	6,399
Recoveries	3,934	3,313	2,319
Net charge-offs (recoveries)	12,932	13,932	4,080
Ending balance	$ 13,269	$ 17,079	$ 20,227

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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