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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
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

X

- 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=73531372&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=73530397&loc=d3e4845-128472

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