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Commitments And Contingencies (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Standby letters of credit    
Other Commitments [Line Items]    
Contractual obligations $ 7,183 $ 7,151
Commercial letters of credit    
Other Commitments [Line Items]    
Contractual obligations 811 831
Home equity lines | Commitments to extend credit:    
Other Commitments [Line Items]    
Contractual obligations 207,509 194,477
Commercial real estate | Commitments to extend credit:    
Other Commitments [Line Items]    
Contractual obligations 68,649 66,901
Other commitments | Commitments to extend credit:    
Other Commitments [Line Items]    
Contractual obligations $ 201,687 $ 184,895