Fair Value - Undesignated Derivative Instruments (Detail) - Mortgage Banking - Level 2 - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Rate lock commitments
Derivatives, Fair Value [Line Items]
Gross assets	$ 37,437	$ 34,935
Gross liabilities	158	25,739
Net commitments	37,279	9,196
Forward sales contracts
Derivatives, Fair Value [Line Items]
Gross assets	1,348	6,822
Gross liabilities	1,236	1,122
Net commitments	$ 112	$ 5,700

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.