Cash and Due from Banks - Additional Information (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Mar. 12, 2021	Dec. 31, 2020
Certificates of deposit federally insured	$ 250		$ 250
Federal Reserve Bank Advances [Member]
Cash Reserve Requirement Percentage		0.00%

The amount of cash deposited in financial institutions as of the balance sheet date that is insured by the Federal Deposit Insurance Corporation.

No definition available.

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