Loans and Allowance for Credit Losses - Summary of Aging of Loans and Loans Held for Sale (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2025	Dec. 31, 2024
Receivables [Abstract]
Capitalized loan origination costs	$ 46.8	$ 46.6