Commitments and Contingent Liabilities - Additional Information (Detail) - USD ($)	6 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Loss Contingencies [Line Items]
Loan commitments outstanding	$ 6,630,609	$ 6,851,890
Loan commitments expiry period	1 year
Commitments to Extend Credit [Member] | George Mason [Member] | Short-term Contract with Customer [Member]
Loss Contingencies [Line Items]
Additional commitments to extend credit		416,095
Commercial Letters of Credit [Member]
Loss Contingencies [Line Items]
Letters of credit issued	$ 15,922	16,233
Standby Letters of Credit [Member]
Loss Contingencies [Line Items]
Letters of credit issued	$ 151,898	$ 147,705