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Employee Benefit Plans (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Defined Benefit Plan Disclosure [Line Items]        
Annual benefits paid to retired participants     $ 0.4  
Pension Benefit Plan [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Benfit plan, cash contributions   $ 1.3   $ 2.3
Expected cash contributions $ 3.0   3.0  
Other Benefits Plan [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Benfit plan, cash contributions $ 0.3 $ 0.2 $ 0.3 $ 0.6