Mortgage Banking Derivatives - Summary of Notional Amount and Fair Value of Mortgage Banking Derivatives (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Included in mortgage banking derivatives liability:
Derivative liability, fair value	$ 224,309	$ 194,503
Interest Rate Lock Commitments [Member]
Included in mortgage banking derivatives asset:
Derivative asset, notional amount	19,003
Included in mortgage banking derivatives liability:
Derivative liability, notional amount		8,863
Included in mortgage banking derivatives asset:
Derivative asset, fair value	364
Included in mortgage banking derivatives liability:
Derivative liability, fair value		95
Forward Sale And Commitments [Member]
Included in mortgage banking derivatives asset:
Derivative asset, notional amount	373
Included in mortgage banking derivatives asset:
Derivative asset, fair value	10
To-be-announced Mortgage-backed Securities Trades [Member]
Included in mortgage banking derivatives liability:
Derivative liability, notional amount	27,000	10,000
Included in mortgage banking derivatives liability:
Derivative liability, fair value	$ 166	$ 80