Fair Value Disclosures - Schedule of Gain Loss on Sale of Mortgage Loans (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Schedule Of Gain Loss On Sale Of Mortgage Loans [Abstract]
Realized gain on sale and fees on mortgage loans*	[1]	$ 3,779	$ 3,429	$ 6,359	$ 6,288
Change in fair value on loans held-for-sale and IRLCs		(179)	(389)	172	145
Change in forward mortgage-backed securities trades		87	494	284	75
Total gain on sale of mortgage loans		$ 3,687	$ 3,534	$ 6,815	$ 6,508

[1] This includes gains on loans held-for-sale carried under the fair value method and lower of cost or market.