Loans and the Allowance for Credit Losses - Recorded Investment in Non-Accrual Loans (Parenthetical) (Detail)	Jun. 30, 2025 USD ($) Borrower	Dec. 31, 2024 USD ($) Borrower
Financing Receivable, Impaired [Line Items]
Number of borrowers with loan balance greater than one million | Borrower	13	6
Borrowers with large amount of loans outstanding, minimum amount of loans per borrower	$ 1,000,000	$ 1,000,000
Borrowers with large amount of loans outstanding, net	37,400,000	13,100,000
Non-accrual loans	84,319,000	$ 39,752,000
Premier Financial Corporation [Member]
Financing Receivable, Impaired [Line Items]
Non-accrual loans	$ 18,900,000