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Fair Value Measurements - Schedule of Estimated Fair Value and Book Value of Debt Instruments (Detail) - USD ($)
$ in Thousands
Jul. 18, 2015
Jan. 03, 2015
Book value of debt instruments:    
Current maturities of long-term debt and capital lease obligations $ 21,669 $ 19,758
Long-term debt and capital lease obligations 516,012 550,510
Total book value of debt instruments 537,681 570,268
Fair value of debt instruments 541,599 574,008
Excess of fair value over book value $ 3,918 $ 3,740