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Employee Benefit Plans (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Defined Benefit Plan Disclosure [Line Items]    
Annual benefits paid to retired participants $ 0.4  
Other Benefits Plan [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Benfit plan, cash contributions 0.3 $ 0.2
Pension Benefit Plan [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Benfit plan, cash contributions   $ 0.5
Expected cash contributions $ 3.4