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Acquisition - Summary of Preliminary Estimated Fair Value of Intangible Assets Acquired and the Related Estimated Useful Lives (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Sep. 30, 2016 | Dec. 31, 2015 | Aug. 31, 2016
STP |  |  |
Business Acquisition [Line Items] |  |  |
Other intangible assets | $ 642,012 |  | $ 642,012
STP | Customer relationships and other identifiable intangible assets |  |  |
Business Acquisition [Line Items] |  |  |
Other intangible assets | $ 642,012 |  |
STP | Customer relationships and other identifiable intangible assets | Minimum |  |  |
Business Acquisition [Line Items] |  |  |
Useful Lives | 4 years |  |
STP | Customer relationships and other identifiable intangible assets | Maximum |  |  |
Business Acquisition [Line Items] |  |  |
Useful Lives | 10 years |  |
Other |  |  |
Business Acquisition [Line Items] |  |  |
Other intangible assets | $ 63,410 |  |
Other | Customer relationships and other identifiable intangible assets |  |  |
Business Acquisition [Line Items] |  |  |
Other intangible assets | $ 63,410 |  |
Other | Customer relationships and other identifiable intangible assets | Minimum |  |  |
Business Acquisition [Line Items] |  |  |
Useful Lives | 10 years |  |
Other | Customer relationships and other identifiable intangible assets | Maximum |  |  |
Business Acquisition [Line Items] |  |  |
Useful Lives | 20 years |  |
2015 Acquisitions |  |  |
Business Acquisition [Line Items] |  |  |
Other intangible assets |  | $ 39,791 |
2015 Acquisitions | Customer relationships |  |  |
Business Acquisition [Line Items] |  |  |
Other intangible assets |  | $ 39,791 |
2015 Acquisitions | Customer relationships | Minimum |  |  |
Business Acquisition [Line Items] |  |  |
Useful Lives |  | 14 years |
2015 Acquisitions | Customer relationships | Maximum |  |  |
Business Acquisition [Line Items] |  |  |
Useful Lives |  | 20 years |

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- Definition The amount of identifiable intangible assets recognized as of the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=35744172&loc=d3e2207-128464 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4845-128472 + Details
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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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