Annual report pursuant to Section 13 and 15(d)

Long-Term Debt - Schedule of Debt (Details)

v3.8.0.1
Long-Term Debt - Schedule of Debt (Details) - USD ($)
$ in Millions
Dec. 31, 2017
Dec. 31, 2016
Debt Instrument [Line Items]    
Long-term debt $ 86.0 $ 21.2
Line of Credit    
Debt Instrument [Line Items]    
Long-term debt 85.0 20.0
Capital lease    
Debt Instrument [Line Items]    
Long-term debt $ 1.0 $ 1.2