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INTEREST RATE SWAPS - NON-HEDGE (Details) - USD ($)
Mar. 31, 2024
Dec. 31, 2023
Information about derivatives and swaps    
Interest-bearing $ 4,061,133,000 $ 3,376,165,000
Cash and cash equivalents 546,363,000 316,567,000
Interest rate swap | Non-Hedge    
Information about derivatives and swaps    
Interest rate swaps with Bank clients - Total, Notional Amount 463,956,000 432,524,000
Net loss position in which pledged securities as collateral are required 250,000  
Interest rate swap | Non-Hedge | Bank Clients    
Information about derivatives and swaps    
Interest rate swaps with Bank clients - Assets, Notional Amount 131,515,000 120,442,000
Interest rate swaps with Bank clients - Liabilities, Notional Amount 100,463,000 95,820,000
Interest rate swaps with Bank clients - Total, Notional Amount 231,978,000 216,262,000
Interest rate swaps with Bank clients - Assets 1,602,000 4,066,000
Interest rate swaps with Bank clients - Liabilities (6,311,000) (4,867,000)
Interest rate swaps with Bank clients - Total, Fair Value (4,709,000) (801,000)
Interest rate swap | Non-Hedge | Counterparty    
Information about derivatives and swaps    
Interest rate swaps with Bank clients - Assets, Notional Amount 100,463,000 95,820,000
Interest rate swaps with Bank clients - Liabilities, Notional Amount 131,515,000 120,442,000
Interest rate swaps with Bank clients - Total, Notional Amount 231,978,000 216,262,000
Offsetting interest rate swaps with institutional swap dealer - Assets, Fair Value 6,311,000 4,867,000
Offsetting interest rate swaps with institutional swap dealer - Liabilities, Fair Value (1,602,000) (4,066,000)
Offsetting interest rate swaps with institutional swap dealer - Total, Fair Value 4,709,000 801,000
Interest rate swap | Non-Hedge | Counterparty | Asset Pledged as Collateral    
Information about derivatives and swaps    
Interest-bearing 5,300,000 1,900,000
Cash and cash equivalents $ 178,000 $ 1,000,000.0