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GOODWILL AND OTHER INTANGIBLES - Gross Amount and Accumulated Amortization of Other Intangible Assets (Detail) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
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Finite Lived Intangible Assets [Line Items] |  |
Net carrying amount | $ 15,229 | $ 21,118
Core Deposits [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross amount | 87,544 | 87,544
Accumulated amortization | (72,315) | (66,644)
Net carrying amount | $ 15,229 | $ 20,900
Remaining amortization period (in years) | 6 years 3 months 18 days | 7 years
Customer Relationships [Member] | Credit Card [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross amount | $ 0 | $ 3,800
Accumulated amortization | 0 | (3,595)
Net carrying amount | 0 | $ 205
Remaining amortization period (in years) |  | 8 months 12 days
Insurance Customer Relationship Intangible [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross amount | 0 | $ 1,067
Accumulated amortization | 0 | (1,054)
Net carrying amount | $ 0 | $ 13
Remaining amortization period (in years) |  | 1 month 6 days

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(16)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482665/350-30-50-2 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 928 -SubTopic 340 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483147/928-340-50-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482665/350-30-50-2 + Details
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