Commitments and Contingencies (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Other Commitments [Line Items]
Commitments and contingencies
Commitments to extend credit: | Home equity
Other Commitments [Line Items]
Commitments and contingencies	221,442	215,619
Commitments to extend credit: | Commercial real estate
Other Commitments [Line Items]
Commitments and contingencies	46,875	65,828
Commitments to extend credit: | Other commitments
Other Commitments [Line Items]
Commitments and contingencies	227,666	245,647
Standby letters of credit
Other Commitments [Line Items]
Commitments and contingencies	6,026	6,460
Commercial letters of credit
Other Commitments [Line Items]
Commitments and contingencies	$ 153	$ 610