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Goodwill and Intangible Assets Other Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Summary of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Asset Impairment Charges	$ 16,249
Finite-Lived Intangible Assets, Gross		$ 973,357	$ 1,032,907
Finite-Lived Intangible Assets, Accumulated Amortization		368,743	305,927
Customer Relationships [Member]
Summary of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross		623,774	663,532
Finite-Lived Intangible Assets, Accumulated Amortization		189,752	150,358
Noncompete Agreements [Member]
Summary of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross		4,693	4,738
Finite-Lived Intangible Assets, Accumulated Amortization		3,945	3,790
Patented Technology [Member]
Summary of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross		226,520	226,318
Finite-Lived Intangible Assets, Accumulated Amortization		126,149	107,598
Trademarks and Trade Names [Member]
Summary of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross		63,570	83,509
Finite-Lived Intangible Assets, Accumulated Amortization		38,850	36,864
supplier relationships [Member]
Summary of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross		54,800	54,800
Finite-Lived Intangible Assets, Accumulated Amortization		10,047	7,307
Other Intangible Assets [Member]
Summary of Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross		0	10
Finite-Lived Intangible Assets, Accumulated Amortization		$ 0	$ 10

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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