Stock-Based Compensation Plans (Tables)

3 Months Ended

Jun. 29, 2019

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Stock-Based compensation expense

The following table summarizes stock-based compensation expense related to stock awards granted under the Company’s equity incentive plans and rights to acquire stock granted under the Company’s Employee Stock Purchase Plan (ESPP):

	Three Months Ended
(In thousands)	June 29, 2019		June 30, 2018
Stock-based compensation included in:
Cost of revenues	$	2,613	$	2,035
Research and development	24,874		20,930
Selling, general and administrative	15,266		12,643
	$	42,753	$	35,608

Schedule of Share-based compensation, restricted stock units, valuation assumption [Table Text Block]

The per share weighted-average fair value of RSUs granted during the first quarter of fiscal 2020 was $98.73 ($65.69 for the first quarter of fiscal 2019), which were calculated based on estimates at the date of grant using the following weighted-average assumptions: 

	Three Months Ended
	June 29, 2019		June 30, 2018
Risk-free interest rate	2.1	%	2.7	%
Dividend yield	1.2	%	2.1	%

Restricted Stock Units (RSUs) [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of restricted stock unit activity and related information

A summary of the Company’s RSU activity and related information is as follows:

	RSUs Outstanding
(Shares in thousands)	Number of Shares		Weighted-Average Grant-Date Fair Value Per Share
March 31, 2018	6,989		$	51.39
Granted	3,559		$	66.94
Vested	(2,681	)	$	49.05
Cancelled	(536	)	$	55.09
March 30, 2019	7,331		$	59.54
Granted	325		$	98.73
Vested	(133	)	$	55.40
Cancelled	(64	)	$	64.91
June 29, 2019	7,459		$	61.28