Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt - Summary (Details)

v3.5.0.2
Long-Term Debt - Summary (Details)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2016
USD ($)
Sep. 30, 2016
USD ($)
Jul. 15, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Long-term debt          
Term Loan, net of debt discount $ 314,295 $ 314,295   $ 186,472  
Less current maturities 2,829 2,829   1,629  
Long-term Debt, Excluding Current Maturities, Total 307,293 307,293   182,506  
Deferred financing costs, net 4,173 4,173   2,337  
Total long-term debt 307,293 307,293   182,506  
Long-term debt, additional disclosure          
Financing costs   2,250      
Inventories - truck chassis floor plan 6,733 6,733      
Term loan facility          
Long-term debt          
Less current maturities 2,829 2,829   1,629  
Long-term Debt, Excluding Current Maturities, Total 311,466 311,466   184,843  
Long-term debt, additional disclosure          
Unamortized discount on issuance of debt 2,050 2,050   1,629 $ 1,900
Financing costs   2,050      
Revolving credit facility          
Long-term debt, additional disclosure          
Financing costs   200      
Revolving credit facility | Maximum          
Long-term debt, additional disclosure          
Facilities consolidation expenditure allowed   15,000      
Incremental Term Loan Facility          
Long-term debt, additional disclosure          
Unamortized discount on issuance of debt 650 650      
Senior credit facilities          
Long-term debt, additional disclosure          
Maximum borrowing capacity 10,000 10,000      
Floor plan financing arrangements     $ 20,000    
Senior credit facilities | Term loan facility          
Long-term debt, additional disclosure          
Borrowings under senior credit facility $ 320,000 $ 320,000 130,000    
Percentage of net cash proceeds of certain asset sales, certain insurance or condemnation events, requirement for additional principal prepayments 100.00%        
Period before end of the fiscal year, for additional principal prepayments of debt, from excess cash flow 150 days        
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        
Debt ratio 3.25 3.25      
Senior credit facilities | Term loan facility | First option | Minimum          
Long-term debt, additional disclosure          
Additional fixed interest rate spread (as a percent) 1.00%        
Additional interest margin added to fixed and variable rates (as a percent) 1.00%        
Senior credit facilities | Term loan facility | First option | Base rate          
Long-term debt, additional disclosure          
Fixed interest rate base (as a percent) 3.25%        
Senior credit facilities | Term loan facility | First option | Federal funds          
Long-term debt, additional disclosure          
Variable rate basis description   Federal funds      
Interest rate added to variable rate (as a percent) 0.50%        
Senior credit facilities | Term loan facility | First option | One month London Interbank Offered Rate          
Long-term debt, additional disclosure          
Variable rate basis description   LIBOR for a one month interest period      
Senior credit facilities | Term loan facility | First option | Prime          
Long-term debt, additional disclosure          
Variable rate basis description   Prime Rate      
Senior credit facilities | Term loan facility | Second option | Minimum          
Long-term debt, additional disclosure          
Additional fixed interest rate spread (as a percent) 1.00%        
Senior credit facilities | Term loan facility | Second option | Base rate          
Long-term debt, additional disclosure          
Fixed interest rate base (as a percent) 4.25%        
Senior credit facilities | Revolving credit facility          
Long-term debt, additional disclosure          
Borrowings under senior credit facility $ 100,000 $ 100,000      
Outstanding borrowings       $ 0  
Remaining borrowing availability 73,315 $ 73,315      
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      
Unused portion of permitted capital expenditures   $ 12,500      
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 added to variable rate (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 added to variable rate (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      
Revolving credit facility          
Long-term debt, additional disclosure          
Outstanding borrowings 26,000 $ 26,000      
Swingline loan          
Long-term debt, additional disclosure          
Maximum borrowing capacity 5,000 5,000      
Prior To Amendment | Senior credit facilities | Term loan facility          
Long-term debt, additional disclosure          
Borrowings under senior credit facility     $ 190,000    
Prior To Amendment | Senior credit facilities | Incremental Term Loan Facility          
Long-term debt, additional disclosure          
Incremental term loan $ 130,000 $ 130,000