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Fair Value Measurements (Impaired Loans Remeasured and Reported at Fair Value of Underlying Collateral) (Detail) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value before allocations	$ 4,982	$ 19,719	$ 6,237
Specific (allocations) reversals of prior allocations	(650)	(3,391)	(1,480)
Fair value	4,332	16,328	4,757
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Reversal of specific valuation allowance allocations			625
Carrying value before allocations	37,082	15,465	8,156
Specific (allocations) reversals of prior allocations	(10,987)	(2,344)
Fair value	$ 26,095	$ 13,121	$ 8,781

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