Goodwill and Other Intangible Assets - Intangible Assets and Amortization Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 2,086,149		$ 2,086,149		$ 2,046,063
Accumulated amortization	1,053,490		1,053,490		1,008,475
Finite-Lived Intangible Assets, Net	1,032,659		1,032,659		1,037,588
Intangible Assets, Gross (Excluding Goodwill)	2,182,842		2,182,842		2,142,731
Intangible assets, net	1,129,352		1,129,352		1,134,256
Amortization expense	34,738	$ 36,356	70,288	$ 72,817
Acquisition-related amortization expense	34,219	$ 35,945	69,374	$ 71,834
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization	0		0		0
Customer Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	1,418,487		1,418,487		1,395,742
Accumulated amortization	671,566		671,566		645,305
Finite-Lived Intangible Assets, Net	746,921		746,921		750,437
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	218,866		218,866		214,774
Accumulated amortization	78,415		78,415		72,305
Finite-Lived Intangible Assets, Net	140,451		140,451		142,469
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	160,402		160,402		144,302
Accumulated amortization	131,435		131,435		128,254
Finite-Lived Intangible Assets, Net	28,967		28,967		16,048
Unpatented Technologies [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	155,484		155,484		155,380
Accumulated amortization	93,046		93,046		85,560
Finite-Lived Intangible Assets, Net	62,438		62,438		69,820
Distributor Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	83,106		83,106		82,970
Accumulated amortization	41,144		41,144		37,943
Finite-Lived Intangible Assets, Net	41,962		41,962		45,027
Drawings and Manuals [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	27,882		27,882		31,849
Accumulated amortization	21,511		21,511		23,273
Finite-Lived Intangible Assets, Net	6,371		6,371		8,576
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	21,922		21,922		21,046
Accumulated amortization	16,373		16,373		15,835
Finite-Lived Intangible Assets, Net	$ 5,549		$ 5,549		$ 5,211