Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt - Summary (Details)

v3.7.0.1
Long-Term Debt - Summary (Details)
 3 Months Ended 6 Months Ended
Feb. 08, 2017
Feb. 07, 2017
Jun. 30, 2017
USD ($)
Jun. 30, 2017
USD ($)
Dec. 31, 2016
USD ($)
Jul. 15, 2016
USD ($)
Dec. 31, 2014
USD ($)
Long-term debt              
Less current maturities     $ (2,765,000) $ (2,765,000) $ (2,829,000)    
Long-term Debt, Excluding Current Maturities, Total     305,819,000 305,819,000 306,726,000    
Deferred financing costs, net     3,621,000 3,621,000 4,033,000    
Total long-term debt     305,819,000 305,819,000 306,726,000    
Long-term debt, additional disclosure              
Financing costs       932,000      
Inventories - truck chassis floor plan     8,721,000 8,721,000 3,939,000    
Term loan facility              
Long-term debt              
Term Loan, net of debt discount     312,205,000 312,205,000 313,588,000    
Less current maturities     (2,765,000) (2,765,000) (2,829,000)    
Long-term Debt, Excluding Current Maturities, Total     309,440,000 309,440,000 310,759,000    
Long-term debt, additional disclosure              
Unamortized discount on issuance of debt     1,757,000 1,757,000 1,953,000   $ 1,900,000
Outstanding borrowings     312,205 312,205      
Revolving credit facility              
Long-term debt, additional disclosure              
Outstanding borrowings     $ 3,000 3,000 0    
Incremental Term Loan Facility              
Long-term debt, additional disclosure              
Unamortized discount on issuance of debt           $ 650,000  
Senior credit facilities              
Long-term debt, additional disclosure              
Floor plan financing arrangements           $ 20,000,000  
Senior credit facilities | Term loan facility              
Long-term debt, additional disclosure              
Financing costs       $ 932,000      
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%        
Senior credit facilities | Term loan facility | Maximum              
Long-term debt, additional disclosure              
Additional term loan commitments     $ 80,000,000        
Debt ratio     3.25 3.25      
Period before end of the fiscal year, for additional principal prepayments of debt, from excess cash flow     150 days        
Senior credit facilities | Term loan facility | ABR              
Long-term debt, additional disclosure              
Interest rate margin (as a percent) 2.50% 3.25%          
Senior credit facilities | Term loan facility | Euro dollar              
Long-term debt, additional disclosure              
Interest rate margin (as a percent) 3.50% 4.25%          
Senior credit facilities | Term loan facility | First option              
Long-term debt, additional disclosure              
Interest rate margin (as a percent)   0.50%          
Fixed interest rate base (as a percent)   2.50%          
Additional interest margin added to fixed and variable rates (as a percent)   1.00%          
Additional fixed interest rate spread (as a percent)   2.00%          
Senior credit facilities | Term loan facility | Second option              
Long-term debt, additional disclosure              
Fixed interest rate base (as a percent)   3.50%          
Additional fixed interest rate spread (as a percent)   1.00%          
Senior credit facilities | Revolving credit facility              
Long-term debt, additional disclosure              
Borrowings under senior credit facility     $ 100,000,000 $ 100,000,000      
Remaining borrowing availability     $ 77,930,000 77,930,000 $ 89,664,000    
Fixed charge coverage ratio to be maintained if certain minimum availability under the credit facility is not maintained.     1.0        
Senior credit facilities | Revolving credit facility | Maximum              
Long-term debt, additional disclosure              
Annual acquisitions allowed     $ 12,500,000        
Unused portion of permitted capital expenditures     12,500,000        
Facilities consolidation expenditure allowed     $ 15,000,000        
Senior credit facilities | Revolving credit facility | Fixed rate | Maximum              
Long-term debt, additional disclosure              
Fixed interest rate base (as a percent)     2.00%        
Senior credit facilities | Revolving credit facility | First option | Fixed rate | Minimum              
Long-term debt, additional disclosure              
Fixed interest rate base (as a percent)     1.50%        
Senior credit facilities | Revolving credit facility | Second option | Federal funds              
Long-term debt, additional disclosure              
Variable rate basis description     Federal funds        
Interest rate margin (as a percent)     0.50%        
Senior credit facilities | Revolving credit facility | Second option | Fixed rate | Maximum              
Long-term debt, additional disclosure              
Fixed interest rate base (as a percent)     1.00%        
Senior credit facilities | Revolving credit facility | Second option | Fixed rate | Minimum              
Long-term debt, additional disclosure              
Fixed interest rate base (as a percent)     0.50%        
Senior credit facilities | Revolving credit facility | Second option | One month London Interbank Offered Rate              
Long-term debt, additional disclosure              
Variable rate basis description     LIBOR for a one month interest period        
Interest rate margin (as a percent)     1.00%        
Senior credit facilities | Revolving credit facility | Second option | Prime              
Long-term debt, additional disclosure              
Variable rate basis description     Prime Rate        
Letter of Credit              
Long-term debt, additional disclosure              
Maximum borrowing capacity     $ 10,000,000 10,000,000      
Swingline loan              
Long-term debt, additional disclosure              
Maximum borrowing capacity     $ 5,000,000 $ 5,000,000