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Benefit Plans - Amounts in Accumulated Other Comprehensive Loss Expected to be Recognized as Components of Net Periodic Pension Costs or Postretirement Benefits Costs in 2014 (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2013
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss	$ 3,935
Prior service cost (credit)	(1,474)
Net periodic benefit expected to be recognized	2,461
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss	1,685
Prior service cost (credit)	36
Net periodic benefit expected to be recognized	1,721
Postretirement Medical [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial loss	2,250
Prior service cost (credit)	(1,510)
Net periodic benefit expected to be recognized	$ 740

X

- Definition

Amount included in accumulated other comprehensive income (AOCI) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position, including gain (loss), prior service cost (credit), and transition asset (obligation).

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount included in accumulated other comprehensive income (AOCI) related to gain (loss) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount included in accumulated other comprehensive income (AOCI) related to prior service cost (credit) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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