Loans and Allowance for Loan Losses - Summary of Aging of Loans (Parenthetical) (Detail) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Receivables [Abstract]
Loan premiums	$ 0.2	$ 0.5
Capitalized loan origination costs	$ 31.6	$ 26.8