Fair Value Disclosures - Schedule of Gain Loss on Sale of Mortgage Loans (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Scheduleofgainlossonsaleofmortgageloans [Abstract]
Realized gain on sale and fees on mortgage loans*	[1]	$ 20,357	$ 37,091	$ 39,378
Change in fair value on loans held-for-sale and IRLCs		1,554	(5,259)	5,900
Change in forward mortgage-backed securities trades		232	1,413	(1,406)
Total gain on sale of mortgage loans		$ 19,035	$ 33,245	$ 43,872

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