Summary of Company's Balance Sheet Related Pension and Other Post-Retirement Benefit Plan (Detail) - USD ($) $ in Thousands	Jul. 18, 2015	Jan. 03, 2015
Post-Retirement Plans [Abstract]
Current benefit liability	$ 1,089	$ 1,089
Noncurrent benefit liability	80,206	93,589
Accumulated other comprehensive loss, net of tax	$ 85,312	$ 86,612