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Long-term Debt (Details)
9 Months Ended
May 25, 2017
USD ($)
Sep. 30, 2017
USD ($)
Sep. 30, 2016
USD ($)
Dec. 31, 2016
USD ($)
Debt Instrument [Line Items]        
Repayments of credit facility   $ 382,147,000 $ 0  
Long-term debt   394,776,000   $ 383,137,000
Amended Facility        
Debt Instrument [Line Items]        
Debt covenant, reduction of basis spread 0.25%      
Covenant for marginal rates, secured leverage ratio, Maximum 1      
Secured leverage ratio 4      
Repayments of credit facility $ 382,000,000      
Debt issuance cost 4,400,000      
Long-term debt   394,800,000   383,100,000
Amended Facility | Revolving credit facility        
Debt Instrument [Line Items]        
Maximum borrowing capacity 120,000,000      
Debt fee amount 300,000      
Revolving credit outstanding   0   0
Amended Facility | Term loan        
Debt Instrument [Line Items]        
Maximum borrowing capacity 400,000,000      
Debt instrument, periodic payment   1,000,000    
End of term payment   373,000,000    
Long-term debt   394,800,000   383,100,000
Fair value of debt outstanding   $ 397,200,000   $ 386,500,000
Effective interest rate   3.51%   3.79%
Amended Facility | Letter of credit        
Debt Instrument [Line Items]        
Maximum borrowing capacity $ 10,000,000      
Variable Rate Option One | Base Rate | Amended Facility        
Debt Instrument [Line Items]        
Basis spread on variable rate 0.00%      
Variable Rate Option One | Federal Fund Rate | Amended Facility        
Debt Instrument [Line Items]        
Basis spread on variable rate 0.50%      
Variable Rate Option One | One Month LIBOR | Amended Facility        
Debt Instrument [Line Items]        
Basis spread on variable rate 1.00%      
Variable Rate Option One | London Interbank Offered Rate (LIBOR) | Amended Facility        
Debt Instrument [Line Items]        
Basis spread on variable rate 1.00%      
Variable Rate Option Two | Base Rate | Amended Facility        
Debt Instrument [Line Items]        
Basis spread on variable rate 0.00%      
Variable Rate Option Two | London Interbank Offered Rate (LIBOR) | Amended Facility        
Debt Instrument [Line Items]        
Basis spread on variable rate 2.00%