ACQUISITIONS (Narrative) (Details) $ in Thousands, shares in Millions |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
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Apr. 01, 2025
shares
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Apr. 01, 2024
USD ($)
item
shares
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Mar. 31, 2025
USD ($)
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Mar. 31, 2024
USD ($)
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Dec. 31, 2024
USD ($)
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| Business Acquisition [Line Items] | |||||
| Goodwill | $ 1,214,053 | $ 1,214,053 | |||
| Merger-related costs | 4,940 | $ 1,874 | |||
| American National | |||||
| Business Acquisition [Line Items] | |||||
| Conversion ratio | 0.00135 | ||||
| Additional shares issued | shares | 14.3 | ||||
| Purchase price consideration | $ 505,473 | ||||
| Number of branches acquired | item | 26 | ||||
| Goodwill | $ 288,842 | 288,800 | |||
| Increase in goodwill | $ 6,500 | ||||
| Accretion expense | 0 | 5,000 | |||
| Merger-related costs | $ 1,600 | ||||
| American National | Wholesale Banking | |||||
| Business Acquisition [Line Items] | |||||
| Goodwill | 210,800 | ||||
| American National | Consumer Banking | |||||
| Business Acquisition [Line Items] | |||||
| Goodwill | $ 78,000 | ||||
| Sandy Spring | |||||
| Business Acquisition [Line Items] | |||||
| Conversion ratio | 0.9 | ||||
| Additional shares issued | shares | 41.0 | ||||
| Purchase price consideration | 1,300,000 | ||||
| Merger-related costs | $ 4,600 | ||||
| X | ||||||||||
- Definition Ratio of stock converted from the acquiree to the acquirer's stock in a business combination. No definition available.
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- Definition The number of branches of a business acquired by the entity during the period. No definition available.
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- Definition Amount recognized for the passage of time, typically for liabilities, that have been discounted to their net present values. Excludes accretion associated with asset retirement obligations. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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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/disclosureRef
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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The number of new shares issued in the conversion of stock in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount, after accumulated impairment loss, of 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://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Amount of increase (decrease) of asset representing future economic benefit from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized, classified as other. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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