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Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2020

Schedule of Total Stock-Based Compensation Expense Included in Company's Consolidated Statements of Income and Comprehensive Income

The total stock-based compensation expense included in the Company’s consolidated statements of income and comprehensive income was as follows:

		Three Months Ended June 30,								Six Months Ended June 30,
		2020				2019				2020				2019
Cost of revenues		$	0.9			$	0.6			$	1.9			$	1.1
Research and development expense			0.9				1.1				2.0				1.9
Selling, general and administrative expense			4.9				4.2				10.8				12.2
Acquisition and integration related expense			0.1				1.0				0.6				19.6
Total pre-tax stock-based compensation expense		$	6.8			$	6.9			$	15.3			$	34.8

Summary of Activity for RSUs

The following table presents the activity for RSUs under the Plan:

		Six Months Ended June 30, 2020
		Outstanding RSUs				Weighted Average Grant Date Fair Value
RSUs – beginning of period			1,102,534			$	85.93
Accrued dividend shares			407			$	105.81
Granted			300,228			$	97.75
Vested			(640,931	)		$	85.10
Forfeited			(55,572	)		$	84.42
RSUs – end of period			706,666			$	91.83

Stock Appreciation Rights (SARs) [Member]

Summary of Activity for Outstanding and Exercisable Stock Appreciation Rights

The following table presents the activity for SARs under the Plan:

		Six Months Ended June 30, 2020
		Outstanding SARs				Weighted Average Grant Date Fair Value
SARs – beginning of period			108,854			$	29.05
Exercised			(46,075	)		$	27.19
Forfeited or expired			(1,400	)		$	22.39
SARs Outstanding – end of period			61,379			$	30.60

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