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Acquisitions Pro Forma Results (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Pro Forma [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenue, Net | $ (80,633) | $ (75,651) | $ (75,006) | $ (74,617) | $ (67,315) | $ (70,199) | $ (69,348) | $ (69,711) | $ (305,907) | $ (276,573) | $ (275,834)
Business Acquisition, Pro Forma Revenue |  |  |  |  |  |  |  |  | 331,522 | 308,250 | 283,573
Net Income (Loss) Attributable to Parent | $ 20,237 | $ 1,321 | $ 7,273 | $ 857 | $ (4,643) | $ 1,825 | $ 172 | $ 1,017 | $ 29,688 | (1,629) | 297
Business Acquisition, Pro Forma Net Income (Loss) |  |  |  |  |  |  |  |  |  | $ (1,148) | $ 317

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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 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=65885119&loc=d3e1392-128463 + Details
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