Performance-Contingent Restricted Stock Activity (Detail) - 6 months ended Jul. 18, 2015 - Performance Contingent Restricted Stock - $ / shares shares in Thousands	Total
Number of Shares
Number of Shares, Balance at beginning of period	1,404
Number of Shares, Initial grant	829
Number of Shares, Vested	(853)
Number of Shares, Forfeitures	(79)
Number of shares, Balance at end of period	1,353
Weighted Average Fair Value
Weighted Average Fair Value, Balance at beginning of period	$ 19.09
Weighted Average Fair Value, Initial grant	20.18
Weighted Average Fair Value, Vested	16.22
Weighted Average Fair Value, Forfeitures	19.58
Weighted Average Fair Value, Balance at end of period	$ 21.26
Performance Contingent Return On Invested Capital Shares
Number of Shares
Number of Shares, Supplemental grant for exceeding ROIC modifier	100
Weighted Average Fair Value
Weighted Average Fair Value, Supplemental grant for exceeding ROIC modifier	$ 15.51
Performance Contingent Total Shareholder Return Shares
Number of Shares
Number of Shares, Grant reduction for not achieving the TSR modifier	(48)
Performance Contingent Total Shareholders Return Shares
Weighted Average Fair Value
Weighted Average Fair Value, Grant reduction for not achieving the TSR modifier	$ 17.22