Goodwill and Other Intangible Assets - Intangible Assets and Amortization Expense (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 2,070,771		$ 2,046,063
Accumulated amortization	1,018,306		1,008,475
Finite-Lived Intangible Assets, Net	1,052,465		1,037,588
Intangible Assets, Gross (Excluding Goodwill)	2,167,442		2,142,731
Intangible assets, net	1,149,136		1,134,256
Amortization expense	35,550	$ 36,461
Acquisition-related amortization expense	35,155	$ 35,889
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization	0		0
Customer Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	1,404,109		1,395,742
Accumulated amortization	648,177		645,305
Finite-Lived Intangible Assets, Net	755,932		750,437
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	217,996		214,774
Accumulated amortization	74,597		72,305
Finite-Lived Intangible Assets, Net	143,399		142,469
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	160,240		144,302
Accumulated amortization	129,692		128,254
Finite-Lived Intangible Assets, Net	30,548		16,048
Unpatented Technologies [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	155,481		155,380
Accumulated amortization	89,379		85,560
Finite-Lived Intangible Assets, Net	66,102		69,820
Distributor Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	83,804		82,970
Accumulated amortization	39,750		37,943
Finite-Lived Intangible Assets, Net	44,054		45,027
Drawings and Manuals [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	27,707		31,849
Accumulated amortization	20,784		23,273
Finite-Lived Intangible Assets, Net	6,923		8,576
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	21,434		21,046
Accumulated amortization	15,927		15,835
Finite-Lived Intangible Assets, Net	$ 5,507		$ 5,211

Acquisition-related amortization expense

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- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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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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- Definition

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

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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

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Amount before accumulated amortization of intangible assets, excluding goodwill.

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- Definition

Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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