Time Deposits - Summary of time Deposits Meet or Exceed Current Federal Deposit Insurance Corporation Insurance Limit for Periods Presented (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deposits [Abstract]
Time deposits of $250,000 or more	$ 150,393	$ 154,646

Amount of uninsured time deposit liability in excess of Federal Deposit Insurance Corporation (FDIC) insurance limit or similar state deposit insurance regime in United States of America (US). Excludes time deposit that is otherwise uninsured.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1406
-Paragraph (f)
-Subparagraph (1)

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