Commitments And Contingencies (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Standby letters of credit
Other Commitments [Line Items]
Contractual obligations	$ 6,460	$ 6,748
Commercial letters of credit
Other Commitments [Line Items]
Contractual obligations	610	1,249
Home equity lines | Commitments to extend credit:
Other Commitments [Line Items]
Contractual obligations	215,619	214,715
Commercial Real Estate [Member] | Commitments to extend credit:
Other Commitments [Line Items]
Contractual obligations	65,828	56,941
Other commitments | Commitments to extend credit:
Other Commitments [Line Items]
Contractual obligations	$ 245,647	$ 213,904