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Derivative Instruments and Hedging Activities - Effect of Derivative Instruments on Comprehensive Income (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income $ 0 $ 0 $ (26,972)
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income, Discontinued Cash Flow Hedge $ 0 $ 0 $ (24,467)
OCI, Cash Flow Hedge, Reclassification for Discontinuance, Statement of Income or Comprehensive Income [Extensible Enumeration] Loss on cash flow hedge derivative terminations Loss on cash flow hedge derivative terminations Loss on cash flow hedge derivative terminations
Interest rate swaps      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain (Loss) Recognized in OCI on Derivatives $ 0 $ 0 $ 9,117
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income $ 0 $ 0 $ (2,505)
OCI, Cash Flow Hedge, Reclassification for Discontinuance, Statement of Income or Comprehensive Income [Extensible Enumeration] Interest Interest Interest
Designated as Hedging Instrument      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Income Recognized in Earnings $ 0 $ 0 $ 0
Designated as Hedging Instrument | Interest rate swaps      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Income Recognized in Earnings $ (1,187) $ 3,422 $ 5,680
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Interest Income (Expense), Net Interest Income (Expense), Net Interest Income (Expense), Net
Designated as Hedging Instrument | AFS debt securities      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Income Recognized in Earnings $ (1,120) $ (3,422) $ (5,680)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Interest Income (Expense), Net Interest Income (Expense), Net Interest Income (Expense), Net
Designated as Hedging Instrument | FHLB advances | Fair Value Hedging      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Income Recognized in Earnings $ 2,307 $ 0 $ 0
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Interest Income (Expense), Net Interest Income (Expense), Net Interest Income (Expense), Net
Not Designated as Hedging Instrument | Interest rate swaps      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Income Recognized in Earnings $ (30) $ 2,338 $ 3,159
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Unrealized Gain (Loss) on Derivatives Unrealized Gain (Loss) on Derivatives Unrealized Gain (Loss) on Derivatives