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Summary Of Significant Accounting Policies (Accounting Changes To Summary Of Equity) (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Jan. 01, 2018
Dec. 31, 2017
Sep. 30, 2017
Dec. 31, 2016
Error Corrections and Prior Period Adjustments Restatement [Line Items]          
Deferred tax asset $ 25,285 $ 24,585 $ 24,746    
Other assets 7,530   5,082    
Total Assets 435,657   423,403    
Retained earnings 42,655 $ 33,250 33,056    
Total stockholders’ equity $ 179,863   181,618 $ 175,128 $ 146,890
Previously Reported [Member]          
Error Corrections and Prior Period Adjustments Restatement [Line Items]          
Deferred tax asset     24,908    
Other assets     4,543    
Total Assets     423,026    
Retained earnings     32,679    
Total stockholders’ equity     181,241 174,795 146,615
Adjustments [Member]          
Error Corrections and Prior Period Adjustments Restatement [Line Items]          
Deferred tax asset     (162)    
Other assets     539    
Total Assets     377    
Retained earnings     377    
Total stockholders’ equity     $ 377 $ 333 $ 275