Noninterest Expense (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Noninterest Expense
Salaries and employee benefits	$ 12,572,000	$ 12,300,000	$ 26,530,000	$ 26,503,000
Reserve for legal settlement	4,000,000		4,000,000
Occupancy and equipment	2,247,000	1,766,000	4,521,000	3,538,000
Professional fees	1,771,000	1,155,000	3,490,000	2,590,000
Amortization of intangible assets	754,000	964,000	1,487,000	1,822,000
Insurance expense	661,000	516,000	1,324,000	1,034,000
Data processing	583,000	779,000	1,117,000	1,755,000
Software subscriptions	501,000	746,000	977,000	1,635,000
Other	2,686,000	2,786,000	5,573,000	7,909,000
Total noninterest expense, excluding merger-related costs	25,775,000	21,012,000	49,019,000	46,786,000
Salaries and employee benefits merger-related costs				356,000
Other	(24,000)	59,000	34,000	2,127,000
Total merger-related costs	$ (24,000)	$ 59,000	$ 34,000	$ 2,483,000