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Financial Statement Information Components of Other Intangibles Acquired as part of a Business Combination (Details) - USD ($) $ in Thousands | Sep. 30, 2017 | Dec. 31, 2016
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All 2017 Acquisitions |  |
Finite-Lived Intangible Assets |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles | $ 31,149 |
Rhiag |  |
Finite-Lived Intangible Assets |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles |  | $ 429,360
PGW |  |
Finite-Lived Intangible Assets |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles |  | $ 37,954
Trade names and trademarks | All 2017 Acquisitions |  |
Finite-Lived Intangible Assets |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles | 15,189 |
Customer and supplier relationships | All 2017 Acquisitions |  |
Finite-Lived Intangible Assets |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles | 10,550 |
Software and technology related assets | All 2017 Acquisitions |  |
Finite-Lived Intangible Assets |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles | 4,796 |
Covenants not to compete | All 2017 Acquisitions |  |
Finite-Lived Intangible Assets |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles | $ 614 |

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