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Derivatives and Hedging Activities - Summary of Effect of Derivative Instruments on Income Statement (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Derivatives, Fair Value [Line Items]        
Total gain (loss) on derivative financial instruments $ (1,346) $ (2,331) $ (2,500) $ (1,545)
Interest Rate Swaps and Caps [Member]        
Derivatives, Fair Value [Line Items]        
Total gain (loss) on derivative financial instruments $ 22 $ (1,702) $ (1,665) $ (895)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Net Swap Fee and Valuation Income (Loss) Net Swap Fee and Valuation Income (Loss) Net Swap Fee and Valuation Income (Loss) Net Swap Fee and Valuation Income (Loss)
Interest Rate Lock Commitments [Member]        
Derivatives, Fair Value [Line Items]        
Total gain (loss) on derivative financial instruments $ (532) $ (8) $ 1,037 $ (124)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Non Interest Income Derived From Mortgage Banking Activities Non Interest Income Derived From Mortgage Banking Activities Non Interest Income Derived From Mortgage Banking Activities Non Interest Income Derived From Mortgage Banking Activities
Forward TBA Contracts [Member]        
Derivatives, Fair Value [Line Items]        
Total gain (loss) on derivative financial instruments $ (836) $ (621) $ (1,872) $ (526)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Non Interest Income Derived From Mortgage Banking Activities Non Interest Income Derived From Mortgage Banking Activities Non Interest Income Derived From Mortgage Banking Activities Non Interest Income Derived From Mortgage Banking Activities