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Acquisitions, Pro Forma Information (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011
Pro Forma Operating Information |  |
Revenues | $ 802,006 | $ 748,127
(Loss) income from continuing operations | (5,127) | 527
Net (loss) income | $ (5,693) | $ 848
(Loss) earnings per share - Basic and Diluted | $ (0.03) | $ 0.00

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- Definition The pro forma income from continuing operations before changes in accounting and extraordinary items, net of tax effect, for the period as if the business combination or combinations had been completed at the beginning of a period. + References 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=7659399&loc=d3e1392-128463 + Details
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