Goodwill and Other Intangible Assets - Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Dec. 31, 2017
Goodwill [Line Items]
Amortization of Intangible Assets	$ 36,356	$ 37,844	$ 72,817	$ 75,479
Goodwill Reallocation Due to Apergy			3,546
Acquisition-related amortization expense	35,945	$ 37,295	71,834	$ 74,398
Goodwill [Roll Forward]
Goodwill Balance	3,715,365		3,715,365		$ 3,715,365	$ 3,686,372
Goodwill, Acquired During Period			46,472
Purchase price adjustments			44
Foreign currency translation			(21,069)
Balance	3,715,365		3,715,365
Disposal Group, Including Discontinued Operation, Goodwill, Current					899,888
Engineered Systems Segment [Member]
Goodwill [Line Items]
Goodwill Reallocation Due to Apergy			3,546
Goodwill [Roll Forward]
Goodwill Balance	1,639,383		1,639,383		1,639,383	1,645,389
Goodwill, Acquired During Period			0
Purchase price adjustments			44
Foreign currency translation			(9,596)
Balance	1,639,383		1,639,383
Fluids Segment [Member]
Goodwill [Line Items]
Goodwill Reallocation Due to Apergy			0
Goodwill [Roll Forward]
Goodwill Balance	1,529,404		1,529,404		1,529,404	1,504,284
Goodwill, Acquired During Period			36,070
Purchase price adjustments			0
Foreign currency translation			(10,950)
Balance	1,529,404		1,529,404
Refrigeration and Food Equipment Segment [Member]
Goodwill [Line Items]
Goodwill Reallocation Due to Apergy			0
Goodwill [Roll Forward]
Goodwill Balance	546,578		546,578		$ 546,578	$ 536,699
Goodwill, Acquired During Period			10,402
Purchase price adjustments			0
Foreign currency translation			(523)
Balance	$ 546,578		$ 546,578