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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
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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

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