Fair Value Measurements (Impaired Loans Remeasured and Reported at Fair Value of Underlying Collateral) (Detail) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value before allocations	$ 6,263	$ 4,982	$ 19,719
Specific (allocations) reversals of prior allocations	(481)	(650)	(3,391)
Fair value	5,782	4,332	16,328
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value before allocations	25,927	37,082	15,465
Specific (allocations) reversals of prior allocations		(10,987)	(2,344)
Reversal of specific valuation allowance allocations	1,204
Fair value	$ 27,131	$ 26,095	$ 13,121