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Fair Value of Long Term Debt (Detail) - USD ($)
$ in Millions
Jun. 28, 2015
Dec. 28, 2014
Debt Instrument [Line Items]    
Revolving credit facility borrowings, Carrying Amount $ 200.0 $ 200.0
Fair Value, Significant Other Observable Inputs (Level 2)    
Debt Instrument [Line Items]    
Revolving credit facility borrowings, Estimated Fair Value $ 200.0 $ 200.0