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Retirement Plans - Weighted Average Assumptions Used to Determine Benefit Obligations and Net Periodic Benefit Cost (Detail)
12 Months Ended
Dec. 28, 2013
Dec. 29, 2012
Weighted-average assumptions used to determine benefit obligations at fiscal year-end:    
Discount rate 5.26% 4.30%
Weighted average assumptions used to determine net periodic benefit cost for the years ended:    
Discount rate 4.30% 5.14%
Expected long-term rate of return on plan assets 7.68% 7.68%
Pension [Member]
   
Weighted-average assumptions used to determine benefit obligations at fiscal year-end:    
Rate of compensation increase 4.85% 4.85%
Weighted average assumptions used to determine net periodic benefit cost for the years ended:    
Rate of compensation increase 4.85% 4.85%
SERP [Member]
   
Weighted-average assumptions used to determine benefit obligations at fiscal year-end:    
Rate of compensation increase 7.00% 7.00%
Weighted average assumptions used to determine net periodic benefit cost for the years ended:    
Rate of compensation increase 7.00% 7.00%