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Debt (Details) - USD ($)
3 Months Ended 12 Months Ended
Jul. 31, 2015
Mar. 31, 2017
Dec. 31, 2016
Nov. 18, 2015
Credit facility        
Less: Amounts due within one year   $ 4,250,000 $ 15,250,000  
Total long-term debt due after one year   403,431,000 $ 392,996,000  
Excess cash flows, repayment of debt, percentage     50.00%  
Excess cash flows threshold for dividends     $ 5,000,000  
Long term debt, gross   417,563,000    
Accretion of debt financing costs included in interest expense   600,000    
Credit Facility | Alternate base rate        
Credit facility        
Margin of interest (as a percent) 3.75%      
Credit Facility | LIBOR        
Credit facility        
Margin of interest (as a percent) 4.75%      
Variable rate base minimum (as a percent) 1.00%      
Term loan        
Credit facility        
Total Term Loan outstanding   407,681,000 408,246,000  
Less: Amounts due within one year   4,250,000 15,250,000  
Total long-term debt due after one year   403,431,000 392,996,000  
Deferred issuance costs, net   9,900,000    
Face amount $ 425,000,000      
Amortization per year (as a percent) 1.00%      
Long term debt, gross   417,600,000    
Revolving loan        
Credit facility        
Maximum borrowing available $ 25,000,000      
Long term debt, gross   0    
Letter-of-credit sub-facility        
Credit facility        
Maximum borrowing available 10,000,000 900,000    
Letters of credit, amount outstanding   $ 0    
Effective interest rate percentage   6.38%    
Successor | Credit Facility        
Credit facility        
Cap on dividends paid and shares and warrants that can be repurchased per fiscal year under restrictive covenants       $ 12,000,000
Successor | Term loan        
Credit facility        
Debt issuance costs incurred 12,900,000      
Successor | Revolving loan        
Credit facility        
Debt issuance costs incurred $ 1,300,000      
Level 2 | Term loan        
Credit facility        
Fair value of debt   $ 415,000,000    
Prepayment due to Excess Cash Flow provision | Term loan        
Credit facility        
Repayments of principal in next 12 months   $ 0 $ 11,000,000