Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt - Summary (Details)

v3.10.0.1
Long-Term Debt - Summary (Details) - USD ($)
$ in Thousands
9 Months Ended
Jan. 31, 2018
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Long-term debt        
Less current maturities   $ 2,749   $ 32,749
Long-term debt, less current maturities   273,428   274,872
Deferred financing costs, net   2,592   3,209
Total long-term debt   273,428   274,872
Long-term debt, additional disclosure        
Financing costs     $ 1,608  
Inventories - truck chassis floor plan   9,495   7,711
Term loan facility        
Long-term debt        
Term Loan, net of debt discount   278,769   310,830
Less current maturities   2,749   32,749
Long-term debt, less current maturities   276,020   278,081
Long-term debt, additional disclosure        
Unamortized discount on issuance of debt   1,269   1,562
Outstanding borrowings   278,769   310,830
Revolving credit facility        
Long-term debt, additional disclosure        
Outstanding borrowings   $ 38,000   0
Senior credit facilities | Term loan facility        
Long-term debt, additional disclosure        
Percentage of net cash proceeds of certain asset sales, certain insurance or condemnation events, requirement for additional principal prepayments   100.00%    
Percentage of excess cash flow paid as additional principal prepayments   50.00%    
Reduced percentage of excess cash flow paid as additional principal prepayments upon achievement of certain leverage ratio thresholds, one   0.00%    
Excess cash flow payment $ 11,279      
Voluntary payment $ 18,721      
Senior credit facilities | Term loan facility | Maximum        
Long-term debt, additional disclosure        
Period before end of the fiscal year, for additional principal prepayments of debt, from excess cash flow   150 days    
Senior credit facilities | Revolving credit facility        
Long-term debt, additional disclosure        
Remaining borrowing availability   $ 61,420   $ 99,463