XML 71 R61.htm IDEA: XBRL DOCUMENT v3.24.1.u1
Derivative Financial Instruments and Hedging Activities - Narrative (Details) - USD ($)
12 Months Ended
Dec. 31, 2023
Mar. 31, 2024
Derivative [Line Items]    
Securities AFS, at estimated fair value $ 1,296,294,000 $ 1,405,221,000
Cash collateral received from counterparties under master netting agreements 46,760,000 65,360,000
Gain (Loss) on Hedging Activity $ 6,500,000  
Fair Value Hedging    
Derivative [Line Items]    
Securities AFS, at estimated fair value   449,400,000
Interest Rate Swap | Cash Flow Hedging    
Derivative [Line Items]    
Derivative, Notional Amount   $ 940,000,000,000