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Significant Accounting Policies (Details) $ in Thousands			12 Months Ended
	Sep. 25, 2019 USD ($) shares	Sep. 17, 2019 shares	Dec. 31, 2020 USD ($) segment	Dec. 31, 2019 USD ($) shares	Dec. 31, 2018 USD ($)
Significant Accounting Policies
Number of operating segments | segment			4
Shares sold | shares				3,289,000
Aggregate offering price	$ 69,100
Underwriting discounts	4,700
Offering cost	1,600
Net proceeds	$ 62,800			$ 62,804
Percentage of commercial and industrial loans not secured by real estate			35.00%	27.80%
Period when accrual of interest on loans is discontinued when loans are past due			90 days
Unrecognized tax position pertaining to interest and penalties			$ 0	$ 0	$ 0
Threshold days on weighted average closing price			20 days
IPO
Significant Accounting Policies
Shares sold | shares		2,860,000
Underwriter
Significant Accounting Policies
Shares sold | shares	429,000
Maximum
Significant Accounting Policies
Period when consumer loans are charged off when loans are past due			120 days

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