LOANS AND ALLOWANCE FOR LOAN AND LEASE LOSSES (Schedule of Loans Acquired) (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Apr. 01, 2025 |
Sep. 30, 2025 |
Sep. 30, 2024 |
Sep. 30, 2025 |
Sep. 30, 2024 |
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| American National | |||||
| Financing Receivable, Allowance for Credit Loss [Line Items] | |||||
| Initial ACL at acquisition | $ 0 | $ (3,896) | |||
| Sandy Spring | |||||
| Financing Receivable, Allowance for Credit Loss [Line Items] | |||||
| Initial ACL at acquisition | $ 0 | $ (28,265) | |||
| Sandy Spring | PCD | |||||
| Financing Receivable, Allowance for Credit Loss [Line Items] | |||||
| Book value of acquired loans at acquisition | $ 1,724,771 | ||||
| Initial ACL at acquisition | (28,265) | ||||
| Non-credit discount at acquisition | (162,140) | ||||
| Purchase Price | 1,534,366 | ||||
| Sandy Spring | Non-PCD | |||||
| Financing Receivable, Allowance for Credit Loss [Line Items] | |||||
| Fair Value | 7,077,565 | ||||
| Gross contractual amounts receivable | 7,676,836 | ||||
| Estimate of contractual cash flows not expected to be collected | $ 130,113 | ||||
| X | ||||||||||
- Definition Amount of estimated contractual cash flow not expected to be collected for receivable purchased without credit deterioration, acquired in business combination. Excludes purchased financial asset with credit deterioration. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Fair value of receivable purchased without credit deterioration, acquired in business combination. Excludes purchased financial asset with credit deterioration. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of gross contractual receivable purchased without credit deterioration, acquired in business combination. Excludes purchased financial asset with credit deterioration. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- 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/disclosureRef
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- Definition Amount of allowance for credit loss at acquisition date of financing receivable purchased with credit deterioration. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount at par value of financing receivable purchased with credit deterioration. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount at purchase price of financing receivable purchased with credit deterioration. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of discount (premium) attributable to other factors on financing receivable purchased with credit deterioration. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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