Note 1. Basis of Presentation (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
Oct. 02, 2011	Sep. 30, 2012	Oct. 02, 2011
Fiscal Period, Policy [Policy Text Block]		The Company's third fiscal quarter ended on September 30, 2012 (2012) and October 2, 2011 (2011), each of which contained 13 weeks. The corresponding 2012 and 2011 year-to-date periods each contained 39 weeks.
Consolidation, Subsidiaries or Other Investments, Consolidated Entities, Policy [Policy Text Block]		The consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated.
Reclassification, Policy [Policy Text Block]		Effective with the first quarter of 2012, certain vendor management and other technology costs which were previously included in selling, general and administrative (“SG&A”) expenses are now included in cost of services, and the prior year's results were revised to conform to this presentation. The only effect of this change was to increase cost of services and decrease SG&A expenses (and gross profit) by $2.9 million in the third quarter of 2011 and $7.9 million in the first nine months of 2011 from those amounts previously reported in 2011.
Prior Period Reclassification Adjustment (in Dollars)	$ 2.9		$ 7.9

Disclosure of accounting policy for subsidiaries or other investments that are consolidated, including the accounting treatment for intercompany accounts or transactions and any noncontrolling interest.

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Disclosure of accounting policy for determining an entity's fiscal year or other fiscal period. This disclosure may include identification of the fiscal period end-date, the length of the fiscal period, any reporting period lag between the entity and its subsidiaries, or equity investees. If a reporting lag exists, the closing date of the entity having a different period end is generally noted, along with an explanation of the necessity for using different closing dates. Any intervening events that materially affect the entity's financial position or results of operations are generally also disclosed.

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