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Merger and Other Acquisitions Schedule of intangible Assets Acquired (Details) - USD ($) $ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Sep. 01, 2016 | Dec. 31, 2016 | Dec. 31, 2015
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Indefinite-Lived Intangible Assets |  | $ 81,633 | $ 1,753
Definite-lived Intangible Assets Acquired |  | 103,250 |
Paw licenses |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Definite-lived Intangible Assets Acquired |  | 32,300 |
Customer Relationships |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Definite-lived Intangible Assets Acquired |  | 14,700 |
Useful life | 5 years |  |
Executive non-compete agreements |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Definite-lived Intangible Assets Acquired |  | $ 8,700 |
Useful life | 2 years |  |

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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