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Acquisition Acquisition - Selected Unaudited Pro-forma Combined Statement of Earnings (Details) - USD ($) $ / shares in Units, $ in Millions				8 Months Ended	12 Months Ended
	May 03, 2021	Dec. 20, 2019	Jan. 19, 2018	Dec. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Business Acquisition, Pro Forma Information [Abstract]
Revenues					$ 868.1	$ 764.3	$ 854.8
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent					$ 150.2	$ 2.9	$ 49.7
Income (Loss) from Continuing Operations, Per Basic Share					$ 1.63	$ 0.03	$ 0.55
Income (Loss) from Continuing Operations, Per Diluted Share					$ 1.59	$ 0.03	$ 0.53
ASIC Design Business [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross		$ 57.9
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual		$ 0.1
Business Acquisition, Pro Forma Information [Abstract]
Business Acquisition, Pro Forma Net Income (Loss)							$ 40.7
Business Acquisition, Pro Forma Earnings Per Share, Basic							$ 0.45
Business Acquisition, Pro Forma Earnings Per Share, Diluted							$ 0.44
Compex Corporation [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross			$ 16.0
Business Acquisition, Pro Forma Information [Abstract]
Business Combination, Consideration Transferred			18.7
Integrated Microwave Corporation
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross	$ 80.7
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual				$ 11.2
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual				$ 0.3
Other liabilities | Compex Corporation [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross			$ 1.0

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