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Borrowings Schedule of Term Loan and Revolving Credit Facility (Details)
$ in Millions
6 Months Ended
Apr. 27, 2016
Jun. 30, 2017
USD ($)
Jun. 30, 2016
USD ($)
Dec. 31, 2016
USD ($)
Mar. 31, 2016
Long-term borrowings [Abstract]          
Long-term debt   $ 298.1   $ 298.2  
Less: current maturities   13.3   9.7  
Long-term portion   284.8   288.5  
Interest Paid, Net   5.8 $ 5.6    
Term Loan due January 2019          
Long-term borrowings [Abstract]          
Debt Issuance Costs, Net   0.3   0.4  
Term Loan and Revolving Credit Facility Due January 2019 [Member]          
Long-term borrowings [Abstract]          
Long-term debt   159.6   163.1  
Less: current maturities   14.2   10.6  
Long-term portion   145.4   152.5  
Debt Issuance Costs, Current, Net   $ 0.2      
Fourth Amendment April 2016          
Long-term borrowings [Abstract]          
Debt Instrument, Covenant, EBITDA to Interest Ratio, Minimum 3.25        
Debt Instrument, Covenant, Debt to EBITDA, Maximum 3.75        
Debt Instrument, Covenant, Senior Secured Leverage Ratio, Maximum 3.25        
Senior Notes          
Long-term borrowings [Abstract]          
Debt Instrument, Term   5 years      
Senior Notes | Term Loan due January 2019          
Long-term borrowings [Abstract]          
Long-term debt   $ 114.9   118.5  
Line of Credit | Revolving Credit Facility          
Long-term borrowings [Abstract]          
Secured revolving credit facility, maximum borrowing capacity   $ 300.0      
Debt Instrument, Term   5 years      
Line of Credit | Revolving Credit Facility | Revolving Credit Facility due January 2019          
Long-term borrowings [Abstract]          
Long-term debt   $ 45.0   $ 45.0  
Minimum | Credit Facilities          
Long-term borrowings [Abstract]          
Line of Credit Facility, Commitment Fee Percentage   0.20%      
Maximum | Credit Facilities          
Long-term borrowings [Abstract]          
Line of Credit Facility, Commitment Fee Percentage   0.40%      
Weighted Average | Credit Facilities          
Long-term borrowings [Abstract]          
Line of Credit Facility, Commitment Fee Percentage   0.39% 0.40%    
LIBOR | Credit Facilities          
Long-term borrowings [Abstract]          
Debt Instrument, Interest Rate, Effective Percentage   3.67%     2.69%
LIBOR | Minimum | Credit Facilities          
Long-term borrowings [Abstract]          
Debt Instrument, Basis Spread on Variable Rate   1.25%      
LIBOR | Maximum | Credit Facilities          
Long-term borrowings [Abstract]          
Debt Instrument, Basis Spread on Variable Rate   2.25%