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Benefit Plans - Pension Plan Assets Measured at Fair Value on Recurring Basis (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 29, 2013
Dec. 30, 2012
Defined Benefit Plan Disclosure [Line Items]    
Total $ 200,824 $ 206,555
Common/Collective Trust Funds Cash Equivalents [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total 196 461
U.S. Large Capitalization Equity Securities [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total   13,414
U.S. Small/Mid-Capitalization Equity Securities [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total   1,789
International Equity Securities [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total   1,548
Common/Collective Trust Funds Equity Securities [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total 120,044 99,399
Equity Securities, Other [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total 624 606
Common/Collective Trust Funds Fixed Income [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total 79,960 89,338
Level 1 [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total 624 17,357
Level 1 [Member] | Common/Collective Trust Funds Cash Equivalents [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total 0 0
Level 1 [Member] | U.S. Large Capitalization Equity Securities [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total   13,414
Level 1 [Member] | U.S. Small/Mid-Capitalization Equity Securities [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total   1,789
Level 1 [Member] | International Equity Securities [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total   1,548
Level 1 [Member] | Common/Collective Trust Funds Equity Securities [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total 0 0
Level 1 [Member] | Equity Securities, Other [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total 624 606
Level 1 [Member] | Common/Collective Trust Funds Fixed Income [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total 0 0
Level 2 [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total 200,200 189,198
Level 2 [Member] | Common/Collective Trust Funds Cash Equivalents [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total 196 461
Level 2 [Member] | U.S. Large Capitalization Equity Securities [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total   0
Level 2 [Member] | U.S. Small/Mid-Capitalization Equity Securities [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total   0
Level 2 [Member] | International Equity Securities [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total   0
Level 2 [Member] | Common/Collective Trust Funds Equity Securities [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total 120,044 99,399
Level 2 [Member] | Equity Securities, Other [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total 0 0
Level 2 [Member] | Common/Collective Trust Funds Fixed Income [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Total $ 79,960 $ 89,338