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
6 Months Ended
Jan. 31, 2018
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Long-term debt        
Less current maturities   $ 2,749   $ 32,749
Long-term debt, less current maturities   273,909   274,872
Deferred financing costs, net   2,798   3,209
Total long-term debt   273,909   274,872
Long-term debt, additional disclosure        
Financing costs     $ 932  
Inventories - truck chassis floor plan   3,658   7,711
Term loan facility        
Long-term debt        
Notes and Loans Payable, Current, Total   279,456   310,830
Less current maturities   2,749   32,749
Long-term debt, less current maturities   276,707   278,081
Long-term debt, additional disclosure        
Unamortized discount on issuance of debt   1,367   1,562
Outstanding borrowings   $ 279,456   310,830
Revolving credit facility        
Long-term debt, additional disclosure        
Outstanding borrowings       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   $ 83,918   $ 99,463