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Employee Benefit Plans - Supplemental Retirement Plan (Details) - Non-Qualified Supplemental Retirement Plan
$ in Millions
Dec. 31, 2016
USD ($)
Defined Benefit Plan Disclosure [Line Items]  
Other liabilities $ (0.2)
Pension and Other Postretirement Defined Benefit Plans, Other LIabilities (1.6)
Total Accumulated Other Comprehensive Loss, net of tax 0.2
Amounts recognized on the balance sheet including accumulated other comprehensive income (loss) $ (1.6)