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BORROWINGS - Subordinate Notes (Details) - Subordinated Debt - USD ($)	Apr. 01, 2024	Jun. 02, 2022	Jun. 01, 2020	Dec. 31, 2024
5.25% notes maturing June 1, 2030
Junior subordinated debt owed to unconsolidated trusts
Principal balance			$ 125,000,000.0
Interest rate			5.25%
Duration of fixed interest rate			5 years
Floating interest rate margin			5.11%
5.000% notes maturing June 15, 2032
Junior subordinated debt owed to unconsolidated trusts
Principal balance		$ 100,000,000.0
Interest rate		5.00%
Floating interest rate margin		2.52%
Percentage of principal amount of notes		100.00%
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]		Secured Overnight Financing Rate (SOFR)
5.25% Notes Maturing December 4, 2030 | Merchants and Manufacturers Bank Corporation
Junior subordinated debt owed to unconsolidated trusts
Principal balance	$ 4,000,000
Floating interest rate margin	4.97%
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR)
Fixed to floating interest rate	5.25%
Fair value discount outstanding				$ 100,000

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