Revenue from Contracts with Customers (Details Textual) - ASC 606	9 Months Ended
	Sep. 30, 2021 USD ($)
Revenue From Contract With Customer [Line Items]
Contingent debit card interchange fees	$ 0
Contingent incentive fees	0
Contingent commission	$ 0
Percentage of insurance agency commissions representing total revenue	2.40%
Percentage of retirement plan consulting fees representing total revenue	0.90%
Percentage of investment commissions representing total revenue	1.50%
Cetera
Revenue From Contract With Customer [Line Items]
Contingent investment commissions to be refunded	$ 0