Deposits - Additional information (Detail) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Deposits [Line Items]
Reciprocal deposits	$ 10.1	$ 9.1
Deposits from related parties	12.7	10.9
Time Deposits [Member]
Deposits [Line Items]
Brokered time deposits	56.9	69.1
Savings Deposits [Member]
Deposits [Line Items]
Brokered time deposits	$ 20.1	$ 21.9

Amount of deposits held by the entity for a related party (entity, shareholder, employee).

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(k)(1))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Name:	us-gaap_RelatedPartyDepositLiabilities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant