Discontinued Operations - Income for Discontinued Operations (Details) - USD ($)		3 Months Ended	12 Months Ended
	Dec. 20, 2018	Dec. 31, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Income from discontinued operations before gain on sale of business			$ 34,400,000	$ 1,800,000	$ 11,200,000
Disposed of by Sale | BioMedical
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Sales			157,000,000
Cost of sales			115,800,000
Selling, general and administrative expenses			32,700,000
Amortization expense			2,300,000
Operating income			6,200,000
Interest expense, net			3,200,000
Other expense (income), net			100,000
Income before income taxes			2,900,000
Income tax expense			2,800,000
Income from discontinued operations before gain on sale of business			100,000
Gain on sale of business, net of taxes of $2.6	$ 34,300,000	$ 34,300,000	34,300,000
Income from discontinued operations, net of tax			34,400,000
Tax on gain on sale of business			$ 2,600,000
Held-for-sale | BioMedical
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations
Sales				145,900,000	137,200,000
Cost of sales				105,400,000	80,500,000
Selling, general and administrative expenses				34,200,000	37,200,000
Amortization expense				2,800,000	3,100,000
Operating income				3,500,000	16,400,000
Interest expense, net				2,100,000	2,200,000
Other expense (income), net				(1,100,000)	(100,000)
Income before income taxes				2,500,000	14,300,000
Income tax expense				700,000	3,100,000
Income from discontinued operations before gain on sale of business				1,800,000	11,200,000
Gain on sale of business, net of taxes of $2.6				0	0
Income from discontinued operations, net of tax				$ 1,800,000	$ 11,200,000