Spin-off of Apergy Corporation (Details) € in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2019 EUR (€)	May 09, 2018 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash received from Apergy, net of cash distributed	$ 0	$ 689,643,000	$ 0
Stockholders' Equity Note, Spinoff Transaction		(906,815,000)
Disposal Group, Including Discontinued Operation, Balance Sheet Disclosures [Abstract]
Cash and Cash Equivalents					$ 10,400,000
Apergy [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Stockholders' Equity Note, Spinoff Transaction		33,000,000
Disposal Group, Including Discontinued Operation, Balance Sheet Disclosures [Abstract]
Cash and Cash Equivalents					10,357,000
Total current assets					462,620,000
Non-current assets					1,438,760,000
Total assets					1,911,737,000
Total current liabilities					185,354,000
Non-current liabilities					119,568,000
Total Liabilities					304,922,000
Net assets distributed					1,606,815,000
Cash received from distribution		$ 700,000,000
Net distribution					906,815,000
Note due 2026 [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Face amount of notes | €				€ 600,000
Debt instrument, stated interest rate (in hundredths)				1.25%
Note due 2026 [Member] | Apergy [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Face amount of notes					300,000,000.0
Debt Instrument, Unused Borrowing Capacity, Amount					$ 415,000,000.0
Debt instrument, stated interest rate (in hundredths)					6.375%