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Acquisition Level 3 (Tables) | 12 Months Ended
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Dec. 31, 2015
Business Combinations [Abstract] |
Business Acquisition, Pro Forma Information [Table Text Block] | The following unaudited pro forma summary presents financial information as if the acquisition had occurred on January 1, 2013 (in thousands):
Revenue |  |  | $ | 2,919,278 |
Net income |  |  | $ | 203,916 |

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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/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=56956515&loc=d3e1392-128463 + Details
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