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Income Taxes (Narrative) (Details) - USD ($)
$ in Millions
6 Months Ended 12 Months Ended
Jun. 30, 2018
Jun. 30, 2018
Dec. 21, 2017
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Tax Credit Carryforward [Line Items]            
Effective federal statutory income tax rate   21.00% 35.00% 21.00% 28.10% 35.00%
Reclassified from aoci to retained earnings, ASU 2018-02 related $ 0.3          
Federal [Member]            
Tax Credit Carryforward [Line Items]            
NOL carryforwad       $ 5.0    
State [Member]            
Tax Credit Carryforward [Line Items]            
NOL carryforwad       0.9    
Certain State Tax Credit Carryforward [Member]            
Tax Credit Carryforward [Line Items]            
Tax credit carryforward       2.3    
Expiring Between 2020 And 2028 [Member]            
Tax Credit Carryforward [Line Items]            
Tax credit carryforward       0.7    
Indefinite Carryforward [Member]            
Tax Credit Carryforward [Line Items]            
Tax credit carryforward       $ 1.6