Annual report pursuant to Section 13 and 15(d)

Long-Term Debt and Notes Payable (Detail)

v3.7.0.1
Long-Term Debt and Notes Payable (Detail)
12 Months Ended
Feb. 28, 2014
USD ($)
Jul. 18, 2013
USD ($)
Dec. 31, 2016
USD ($)
fiscal_quarter
Dec. 31, 2015
USD ($)
Sep. 26, 2014
USD ($)
Debt Instrument          
Leverage ratio increase, duration of permitted following acquisition (in fiscal quarters) | fiscal_quarter     2    
Actual interest coverage ratio at end of period     29.5    
Actual leverage ratio at end of period     1.38    
Amended And Restated Credit Agreement          
Debt Instrument          
Permitted leverage ratio     3.5    
Minimum interest coverage ratio     3.0    
Amended And Restated Credit Agreement | Maximum          
Debt Instrument          
Permitted leverage ratio     4.0    
Line of Credit | Revolving Credit Facility | LIBOR | Minimum          
Debt Instrument          
Interest rate on revolving credit at LIBOR rate     1.375%    
Line of Credit | Revolving Credit Facility | LIBOR | Maximum          
Debt Instrument          
Interest rate on revolving credit at LIBOR rate     2.25%    
Line of Credit | Original Facility | Revolving Credit Facility          
Debt Instrument          
Revolving credit line         $ 6,000,000
Line of Credit | Third Amended and Restated Credit Agreement | Minimum          
Debt Instrument          
Commitment fee (percentage)   0.25%      
Line of Credit | Third Amended and Restated Credit Agreement | Maximum          
Debt Instrument          
Commitment fee (percentage)   0.50%      
Line of Credit | Third Amended and Restated Credit Agreement | Revolving Credit Facility          
Debt Instrument          
Revolving credit line $ 58,000,000 $ 75,000,000      
Debt instrument term (in years)   5 years      
Line of credit facility maximum borrowings $ 125,000,000        
Line of credit extension period 5 years        
Line of Credit | Third Amended and Restated Credit Agreement | Revolving Credit Facility | Minimum          
Debt Instrument          
Commitment fee (percentage) 0.25%        
Line of Credit | Third Amended and Restated Credit Agreement | Revolving Credit Facility | Maximum          
Debt Instrument          
Commitment fee (percentage) 0.50%        
Line of Credit | Third Amended and Restated Credit Agreement | Revolving Credit Facility | LIBOR | Minimum          
Debt Instrument          
Interest rate on revolving credit at LIBOR rate   2.25%      
Line of Credit | Third Amended and Restated Credit Agreement | Revolving Credit Facility | LIBOR | Maximum          
Debt Instrument          
Interest rate on revolving credit at LIBOR rate   3.50%      
Line of Credit | Fourth Amended and Restated Credit Agreement | Revolving Credit Facility          
Debt Instrument          
Term loan     $ 136,000,000 $ 155,000,000  
Revolving line of credit         350,000,000
Optional increase in maximum borrowing capacity         150,000,000
Line of Credit | Fourth Amended and Restated Credit Agreement | Revolving Credit Facility | Minimum          
Debt Instrument          
Commitment fee (percentage)     0.175%    
Line of Credit | Fourth Amended and Restated Credit Agreement | Revolving Credit Facility | Maximum          
Debt Instrument          
Commitment fee (percentage)     0.35%    
Line of Credit | Fourth Amended and Restated Credit Agreement | Revolving Credit Facility | LIBOR | Minimum          
Debt Instrument          
Interest rate on revolving credit at LIBOR rate     1.375%    
Line of Credit | Fourth Amended and Restated Credit Agreement | Revolving Credit Facility | LIBOR | Maximum          
Debt Instrument          
Interest rate on revolving credit at LIBOR rate     2.25%    
Line of Credit | Fourth Amended and Restated Credit Agreement | Letter of Credit          
Debt Instrument          
Credit facility allocation         20,000,000
Outstanding letters of credit     $ 1,100,000    
Term Loan | Original Facility          
Debt Instrument          
Term loans outstanding         $ 180,500,000
Term Loan | Third Amended and Restated Credit Agreement          
Debt Instrument          
Debt instrument term (in years)   5 years      
Term loan   $ 190,000,000