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DEPOSITS - Narrative (Detail) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Deposit Liability [Line Items]
Time deposits greater than $250,000	$ 990.3	$ 803.1
Demand deposit overdrafts reclassified as loans	0.8	1.2
State and municipal deposits	1,700.0	1,500.0
Asset Pledged as Collateral
Deposit Liability [Line Items]
Available borrowing capacity through FHLB	$ 1,800.0	$ 1,500.0

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- Definition

Deposits, State And Municipal, Secured By Collateral

+ References

No definition available.

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Amount of deposits held by the entity that have been reclassified as loan balances receivable, for example, but not limited to, overdrafts receivable.

+ References

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-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)
-SubTopic 405
-Topic 942
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478353/942-405-50-1

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1406
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-Publisher SEC

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Amount of advances or credit lines available from the Federal Home Loan Bank (FHLB).

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
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Amount of time deposit liabilities, including certificates of deposit, in denominations that meet or exceed the Federal Deposit Insurance Corporation (FDIC) insurance limit.

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