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Acquisitions - Acquisition of Unaflex LLC (Details) - USD ($) |  | 2 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Aug. 14, 2017 | Sep. 30, 2017 | Sep. 30, 2017 | Sep. 30, 2017 | Dec. 31, 2016
Business Acquisition [Line Items] |  |  |  |  |
Acquisition transaction costs |  |  |  | $ 5,002,000 |
Goodwill |  | $ 264,840,000 | $ 264,840,000 | $ 264,840,000 | $ 151,455,000
Unaflex, LLC [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Cash Paid to Seller Borrowed Under the Revolving Credit Facility | $ 31,274,000 |  |  |  |
Revenues reported by acquired entity |  |  |  |  | $ 17,494,000
Goodwill | $ 15,277,000 |  |  |  |
Revenues from the date of acquisition |  | 2,522,000 |  |  |
Operating loss from the date of acquisition |  | $ 36,000 |  |  |
Amortization expense |  |  | $ 106,000 |  |

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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=73531572&loc=d3e1043-128460 + Details
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