Goodwill and Other Intangible Assets - Intangible Assets and Amortization Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Goodwill, Acquired During Period			$ 46,472
Gross carrying amount	$ 2,078,998		2,078,998		$ 2,063,100
Accumulated amortization	947,132		947,132		877,276
Finite-Lived Intangible Assets, Net	1,131,866		1,131,866		1,185,824
Indefinite-Lived Intangible Assets (Excluding Goodwill)	96,739		96,739		96,800
Intangible Assets, Gross (Excluding Goodwill)	2,175,737		2,175,737		2,159,900
Amortization expense	36,356	$ 37,844	72,817	$ 75,479
Acquisition-related amortization expense	35,945	$ 37,295	71,834	$ 74,398
Intangible assets, net	1,228,605		1,228,605		1,282,624
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization	0		0		0
Indefinite-Lived Intangible Assets (Excluding Goodwill)	96,739		96,739		96,800
Customer Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	1,413,880		1,413,880		1,405,361
Accumulated amortization	604,476		604,476		559,447
Finite-Lived Intangible Assets, Net	809,404		809,404		845,914
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	217,126		217,126		217,621
Accumulated amortization	65,392		65,392		58,523
Finite-Lived Intangible Assets, Net	151,734		151,734		159,098
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	145,059		145,059		145,577
Accumulated amortization	125,950		125,950		123,135
Finite-Lived Intangible Assets, Net	19,109		19,109		22,442
Unpatented Technologies [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	157,161		157,161		152,913
Accumulated amortization	78,745		78,745		71,284
Finite-Lived Intangible Assets, Net	78,416		78,416		81,629
Distributor Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	85,145		85,145		85,794
Accumulated amortization	35,235		35,235		32,092
Finite-Lived Intangible Assets, Net	49,910		49,910		53,702
Drawings and Manuals [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	32,522		32,522		32,739
Accumulated amortization	22,182		22,182		20,767
Finite-Lived Intangible Assets, Net	10,340		10,340		11,972
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	28,105		28,105		23,095
Accumulated amortization	15,152		15,152		12,028
Finite-Lived Intangible Assets, Net	$ 12,953		$ 12,953		$ 11,067