Summary of Significant Accounting Policies - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2022	Sep. 17, 2018
Accounting Policies [Line Items]
Date of incorporation	Apr. 06, 2018
Residential loans [Member]
Accounting Policies [Line Items]
Number of days past due for loans to be declared as deliquent	180 days
Consumer loans [Member]
Accounting Policies [Line Items]
Number of days past due for loans to be declared as deliquent	120 days
Stonebridge Bank [Member]
Accounting Policies [Line Items]
Business acquistion percentage of voting interests acquired		100.00%