Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt - Other (Details)

v3.8.0.1
Long-Term Debt - Other (Details)
$ in Thousands
9 Months Ended
May 05, 2017
Sep. 30, 2017
USD ($)
Dec. 31, 2016
USD ($)
Long-Term Debt      
Less: revolving credit facility   $ (5,000)  
New Credit Agreement      
Debt covenants      
Maximum Net Leverage Ratio   3.50  
Minimum FCCR   1.25  
Revolving Facility | New Credit Agreement      
Long-Term Debt      
Revolving Facility   $ 250,000  
Less: revolving credit facility   (5,000)  
Less: standby letters of credit   (47,055)  
Capacity under Revolving Facility   $ 197,945  
Revolving Facility | Original Credit Agreement      
Long-Term Debt      
Revolving Facility     $ 125,000
Less: standby letters of credit     (49,080)
Capacity under Revolving Facility     $ 75,920
Debt Covenants Term Period One | New Credit Agreement      
Debt covenants      
Maximum Net Leverage Ratio 3.50    
Minimum FCCR 1.25    
Debt Covenants Term Period Two | New Credit Agreement      
Debt covenants      
Maximum Net Leverage Ratio 3.25    
Minimum FCCR 1.25    
Debt Covenants Term Period Three | New Credit Agreement      
Debt covenants      
Maximum Net Leverage Ratio 3.00    
Minimum FCCR 1.25