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Employee Benefit Plans - Assumption Used to Determine Net Period Benefit Cost (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 30, 2012	Jan. 01, 2012	Jan. 02, 2011
Assumptions used to determine net periodic benefit cost
Discount rate	4.70%	5.30%	5.60%
Rate of compensation	2.00%	2.00%	2.00%
Assumptions used to determine benefit obligations
Discount rate	4.00%	4.70%	5.30%
Rate of compensation	2.00%	2.00%	2.00%
Components of net periodic benefit cost
Service cost	$ 505	$ 492	$ 357
Interest cost	10,212	11,194	10,873
Net periodic benefit cost	789	322	1,827
Salary Continuation Plan (SCP) [Member]
Assumptions used to determine net periodic benefit cost
Discount rate	4.75%	5.50%	6.00%
Rate of compensation	4.00%	4.00%	4.00%
Assumptions used to determine benefit obligations
Discount rate	4.00%	4.75%	5.50%
Rate of compensation	4.00%	4.00%	4.00%
Components of net periodic benefit cost
Service cost	452	393	342
Interest cost	1,014	1,138	1,121
Amortizations	316	637	545
Net periodic benefit cost	$ 1,782	$ 2,168	$ 2,008

X

- Definition

The amounts in accumulated other comprehensive income related to gains and losses that are not recognized immediately and are expected to be recognized as components of net periodic benefit cost over the next fiscal year that follows the most recent annual statement of financial position presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-Number 132R

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X

- Definition

The interest rate used to adjust for the time value of money for the plan.

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- Definition

Expected rate of compensation increases (for pay-related plans).

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- Definition

The interest rate used to adjust for the time value of money.

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Expected rate of compensation increases (for pay-related plans).

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X

- Definition

The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time.

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-Number 106

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- Definition

The total amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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- Definition

The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan.

+ References

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Service Cost (Component of Net Periodic Pension Cost)

-URI http://asc.fasb.org/extlink&oid=6525008



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