Stock Appreciation Rights Activity (Detail) (Stock Appreciation Rights, USD $) In Thousands, except Share data, unless otherwise specified	4 Months Ended
	Apr. 25, 2015
Stock Appreciation Rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Balance at beginning of period	29,000
Number of Rights, Rights exercised	0
Number of shares, Balance at end of period	29,000
Weighted Average Grant Date Fair Value outstanding, at beginning of period	$ 8.47
Weighted Average Grant Date Fair Value, Rights exercised	$ 0
Weighted Average Grant Date Fair Value outstanding, at end of period	$ 8.47
Outstanding unvested at beginning of period, Aggregate Liability	$ 405