Subordinated Notes - Additional Information (Detail) $ in Millions	Jul. 30, 2021 USD ($)
Debt Instrument [Line Items]
Fixed-to-floating interest rate	3.25%
Debt instrument basis points	2.63%
Debt instrument, frequency of periodic payment	semi-annually
Term of loan	5 years
Redemption price of principal amount of notes redeemed	100.00%
Private Placement
Debt Instrument [Line Items]
Subordinated notes	$ 35
Fixed-to-floating interest rate	3.25%
Subordinated notes, due date	Jul. 30, 2031
Percentage of notes prices on principal amount	100.00%