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Credit Agreements - Additional Information (Detail) - 2014 Revolver - Senior Secured Revolving Credit Facility - USD ($)
3 Months Ended 6 Months Ended
Dec. 11, 2014
Jun. 28, 2017
Jun. 29, 2016
Jun. 28, 2017
Jun. 29, 2016
Debt Instrument [Line Items]          
Senior secured revolving facility $ 200,000,000        
Senior secured revolving facility term 5 years        
Letters of credit outstanding   $ 8,100,000   $ 8,100,000  
Revolving line of credit   94,500,000   94,500,000  
Amount of borrowings available   97,400,000   $ 97,400,000  
Revolving credit facility maturity period       Dec. 11, 2019  
Debt instrument basis percentage       1.00%  
Principal payments prior to maturity       $ 0  
Debt instrument, periodic payment   $ 6,500,000   $ 9,500,000  
Minimum          
Debt Instrument [Line Items]          
Debt instrument, interest rate   2.69% 2.19% 2.44% 2.02%
Maximum          
Debt Instrument [Line Items]          
Debt instrument, interest rate   2.96% 2.20% 2.96% 2.20%
Federal Funds Rate          
Debt Instrument [Line Items]          
Debt instrument basis percentage       0.50%  
Base Rate | Minimum          
Debt Instrument [Line Items]          
Debt instrument basis percentage       0.75%  
Base Rate | Maximum          
Debt Instrument [Line Items]          
Debt instrument basis percentage       1.50%  
LIBOR | Minimum          
Debt Instrument [Line Items]          
Debt instrument basis percentage       1.75%  
LIBOR | Maximum          
Debt Instrument [Line Items]          
Debt instrument basis percentage       2.50%  
Letter of Credit          
Debt Instrument [Line Items]          
Sub limit of revolving facility $ 15,000,000        
Swing Line Loans          
Debt Instrument [Line Items]          
Sub limit of revolving facility $ 15,000,000