Discontinued Operations - Schedule of Amounts Included in Discontinued Operations (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Earnings from discontinued operations, net of tax	$ 15,600,000	$ 19,100,000
Gain on disposition of discontinued operations, net of tax	1,717,300,000	0
Net earnings from discontinued operations	1,732,900,000	19,100,000
Depreciation and amortization	0	1,900,000
Held-for-sale or Disposed of by Sale | TransCore Holdings Inc, Zetec and Civco Radiotherapy
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenues	100,400,000	152,500,000
Cost of sales	71,200,000	94,700,000
Gross profit	29,200,000	57,800,000
Selling, general and administrative expenses	19,900,000	31,900,000
Income from operations	9,300,000	25,900,000
Other income (expense), net	100,000	(100,000)
Earnings before income taxes	9,400,000	25,800,000
Income taxes	(6,200,000)	6,700,000
Earnings from discontinued operations, net of tax	15,600,000	19,100,000
Gain on disposition of discontinued operations, net of tax	1,717,300,000	0
Net earnings from discontinued operations	1,732,900,000	19,100,000
Stock-based compensation expense	900,000	$ 1,300,000
Held-for-sale or Disposed of by Sale | Civco Radiotherapy
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on disposition of discontinued operations, net of tax	$ 4,500,000