Interest-Bearing Deposits - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Deposits [Abstract]
Certificates of deposit in denominations of $100 thousand or more	$ 432.4	$ 459.9
Interest expense related to certificates of deposit $100 thousand or greater	16.5	16.6	$ 8.1
Deposit Liabilities Reclassified as Loans Receivable	$ 0.8	$ 0.9

Amount of deposits held by the entity that have been reclassified as loan balances receivable, for example, but not limited to, overdrafts receivable.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)
-SubTopic 405
-Topic 942
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478353/942-405-50-1

Name:	us-gaap_DepositLiabilitiesReclassifiedAsLoansReceivable1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant