Acquisitions and Divestitures - Narrative (Details) $ in Thousands	Oct. 31, 2018 USD ($)	Aug. 31, 2018 USD ($)	Jun. 30, 2019 USD ($)	Dec. 31, 2018 USD ($)	Oct. 30, 2018 employee
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Goodwill			$ 3,080,395	$ 3,081,302
Valves Business | Disposal Group, Held-for-sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Period of continuing involvement after disposal		5 years
Disposal group, consideration		$ 165,500
Disposal group, cash and cash equivalents		11,800
Disposal group, liabilities		$ 16,400
GIGAVAC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of employees (more than) | employee					270
Merger With GIGAVAC, LLC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Purchase price	$ 233,000
Consideration related to certain compensation arrangements	12,000
Goodwill	$ 113,731