Goodwill and Other Intangible Assets - Intangible Assets and Amortization Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 2,083,106		$ 2,083,106		$ 2,063,100
Accumulated amortization	984,026		984,026		877,276
Finite-Lived Intangible Assets, Net	1,099,080		1,099,080		1,185,824
Indefinite-lived Intangible Assets (Excluding Goodwill)	96,770		96,770		96,800
Intangible Assets, Gross (Excluding Goodwill)	2,179,876		2,179,876		2,159,900
Intangible assets, net	1,195,850		1,195,850		1,282,624
Amortization expense	35,576	$ 37,870	108,393	$ 113,349
Acquisition-related amortization expense	35,258	$ 37,324	107,092	$ 111,722
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization	0		0		0
Indefinite-lived Intangible Assets (Excluding Goodwill)	96,770		96,770		96,800
Customer Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	1,416,686		1,416,686		1,405,361
Accumulated amortization	628,959		628,959		559,447
Finite-Lived Intangible Assets, Net	787,727		787,727		845,914
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	217,289		217,289		217,621
Accumulated amortization	69,224		69,224		58,523
Finite-Lived Intangible Assets, Net	148,065		148,065		159,098
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	145,357		145,357		145,577
Accumulated amortization	127,590		127,590		123,135
Finite-Lived Intangible Assets, Net	17,767		17,767		22,442
Unpatented Technologies [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	157,394		157,394		152,913
Accumulated amortization	82,670		82,670		71,284
Finite-Lived Intangible Assets, Net	74,724		74,724		81,629
Distributor Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	85,202		85,202		85,794
Accumulated amortization	36,874		36,874		32,092
Finite-Lived Intangible Assets, Net	48,328		48,328		53,702
Drawings and Manuals [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	32,832		32,832		32,739
Accumulated amortization	23,175		23,175		20,767
Finite-Lived Intangible Assets, Net	9,657		9,657		11,972
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	28,346		28,346		23,095
Accumulated amortization	15,534		15,534		12,028
Finite-Lived Intangible Assets, Net	$ 12,812		$ 12,812		$ 11,067