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Shareholders' Equity - Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 14.5	$ 13.3	$ 11.9
Additional information
Expected pre-tax stock-based compensation expense	$ 3.0
Weighted average remaining service period	2 years 6 months
2016 Incentive Compensation Plan
Additional information
Expected pre-tax stock-based compensation expense	$ 27.1
Weighted average remaining service period	2 years 4 months 24 days
Cost of revenues
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 2.2	2.0	1.8
Selling, general and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	10.1	9.3	8.3
Research and development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	2.2	2.0	1.8
Mestrelab
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	2.7	2.6	2.3
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	1.3	1.8	2.7
Restricted stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation			0.3
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 13.2	$ 11.5	$ 8.9