Acquisitions and Divestitures - Divestitures (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Mar. 12, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income tax expense		$ 35,343	$ 17,427	$ 95,987	$ 63,759
Disposed of by Sale | CiDRA Precision Services
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of businesses, net of cash sold	$ 1,000
Gain on sale	500
Income tax expense	100
Revenue	$ 900