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Acquisitions Business Acquisition (Tables) | 6 Months Ended
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Jun. 30, 2019
Business Acquisition [Line Items] |
Business Acquisition, Pro Forma Information [Table Text Block] | The summary below (in millions, except for per share data) presents pro forma unaudited condensed consolidated results of operations for the three and six months ended June 30, 2018 as if the acquisition of ECS by the Company and the acquisition of a business by ECS in April 2017, both occurred on January 1, 2017. The pro forma unaudited condensed consolidated results give effect to, among other things: (i) amortization of intangible assets, (ii) stock-based compensation expense and the related dilution for restricted stock units granted to ECS employees, (iii) interest expense on acquisition-related debt and (iv) the exclusion of nonrecurring expenses incurred by ECS prior to its acquisition by the Company for ECS’ acquisition-related activities and costs incurred in the sale of ECS to the Company. The pro forma results do not include pre-acquisition results of DHA due to its size. The pro forma results are not necessarily indicative of the operating results that would have occurred had the acquisitions been consummated as of the date indicated, nor are they necessarily indicative of future operating results.
|  | Three Months Ended |  | Six Months Ended
|  | June 30, 2018 |  | June 30, 2018
Revenues |  | $ | 878.5 |  |  | $ | 1,712.7 |
Income from continuing operations |  | $ | 39.9 |  |  | $ | 74.5 |
Net income |  | $ | 39.8 |  |  | $ | 74.3 |
Earnings per share: |  |  |  |
Basic |  | $ | 0.76 |  |  | $ | 1.42 |
Diluted |  | $ | 0.75 |  |  | $ | 1.40 |
Weighted average number of shares outstanding |  | 52.3 |  |  | 52.3 |
Weighted average number of shares and dilutive shares outstanding |  | 53.1 |  |  | 53.0 |

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- Definition Tabular disclosure of pro forma results of operations for a material business acquisition or series of individually immaterial business acquisitions that are material in the aggregate. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(3) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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