Stock-Based Compensation (Performance-Contingent Restricted Stock) - Additional Information (Detail) (USD $)	6 Months Ended
	Jul. 12, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividends paid on vested performance-contingent restricted stock awards	$ 609,000
Unrecognized compensation cost related to nonvested restricted stock granted by the EPIP	8,100,000
Expected weighted-average period to recognize compensation cost (years)	1 year 3 months 18 days
Performance Contingent Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividends paid on vested performance-contingent restricted stock awards	400,000
Award vesting tax windfall	2,700,000
Unrecognized compensation cost related to nonvested restricted stock granted by the EPIP	15,900,000
Total fair value of shares vested	13,600,000
Total share holder return
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Additional common shares issued	50,939
Expected weighted-average period to recognize compensation cost (years)	1 year 3 months 18 days
Performance Contingent Total Shareholder Return Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum percentage of change in grant	195.00%
Performance Contingent Total Shareholder Return Shares | Total share holder return
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Additional common shares issued	193,756
Performance Contingent Return On Invested Capital Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum percentage of change in grant	125.00%
Unrecognized compensation cost related to nonvested restricted stock granted by the EPIP	$ 7,700,000
Expected weighted-average period to recognize compensation cost (years)	1 year 3 months 18 days