Goodwill and Other Intangible Assets - Goodwill (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018	Dec. 31, 2017
Goodwill [Line Items]
Goodwill Reallocation Due to Apergy	$ 3,546
Goodwill Transferred to Apergy		$ 899,888
Goodwill [Roll Forward]
Goodwill Balance	3,719,598	3,719,598	$ 3,686,372
Goodwill, Acquired During Period	46,895
Purchase Price Adjustments	328
Foreign Currency Translation	(17,543)
Balance	3,719,598
Engineered Systems Segment [Member]
Goodwill [Line Items]
Goodwill Reallocation Due to Apergy	3,546
Goodwill [Roll Forward]
Goodwill Balance	1,642,780	1,642,780	1,645,389
Goodwill, Acquired During Period	0
Purchase Price Adjustments	328
Foreign Currency Translation	(6,483)
Balance	1,642,780
Fluids Segment [Member]
Goodwill [Line Items]
Goodwill Reallocation Due to Apergy	0
Goodwill [Roll Forward]
Goodwill Balance	1,530,150	1,530,150	1,504,284
Goodwill, Acquired During Period	36,493
Purchase Price Adjustments	0
Foreign Currency Translation	(10,627)
Balance	1,530,150
Refrigeration and Food Equipment Segment [Member]
Goodwill [Line Items]
Goodwill Reallocation Due to Apergy	0
Goodwill [Roll Forward]
Goodwill Balance	546,668	$ 546,668	$ 536,699
Goodwill, Acquired During Period	10,402
Purchase Price Adjustments	0
Foreign Currency Translation	(433)
Balance	$ 546,668