ACQUISITION - Pro Forma Financial Data (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 27, 2013	Sep. 28, 2012	Sep. 27, 2013	Sep. 28, 2012
Business Acquisition, Pro Forma Information [Abstract]
Revenue from services	$ 451.2	$ 438.0	$ 1,244.1	$ 1,207.2
Net income	$ 19.0	$ 13.6	$ 34.5	$ 22.6
Net income per common share - diluted (in dollars per share)	$ 0.47	$ 0.34	$ 0.85	$ 0.57

The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(2)-(3)

-URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463

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- Definition

The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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- Definition

The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

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