GOODWILL AND OTHER INTANGIBLE ASSETS - Additional Information (Details) - USD ($) |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Aug. 31, 2026 |
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
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| Goodwill [Line Items] | |||||
| Goodwill impairment | $ 0 | ||||
| Impairment charges | $ 0 | $ 0 | |||
| Amortization of other intangible assets | $ 23,331,000 | $ 26,184,000 | $ 72,946,000 | $ 52,644,000 | |
| Minimum | Core deposit | |||||
| Goodwill [Line Items] | |||||
| Estimated useful lives | 5 years | 5 years | |||
| Maximum | Core deposit | |||||
| Goodwill [Line Items] | |||||
| Estimated useful lives | 15 years | 15 years | |||
| X | ||||||||||
- Definition Amount of amortization expense for finite-lived intangible asset. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Useful life of finite-lived intangible asset, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of impairment loss from asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Amount of impairment loss for indefinite-lived intangible asset. Excludes goodwill. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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