STOCK PLANS AND STOCK-BASED COMPENSATION (Tables)

12 Months Ended

Mar. 28, 2020

Share-based Payment Arrangement [Abstract]

Share-based Payment Arrangement, Performance Shares, Activity [Table Text Block]

The following table summarizes the changes in unvested PSUs, for Fiscal Year 2020:

	Number of Shares		Weighted Average Grant Date Fair Value
	(in thousands)
Unvested at March 30, 2019	143		$	70.53
Granted	384		$	57.16
Vested	(20	)	$	36.76
Forfeited	(86	)	$	65.09
Non-vested at March 28, 2020	421		$	61.09

Stock-Based Compensation Expense Included in Statements of Operations

The following table summarizes the amount of stock-based compensation expense included in the consolidated statements of operations for the periods presented:

	Fiscal Year Ended
(in thousands)	March 28, 2020			March 30, 2019			March 31, 2018
Cost of revenues	$	3,992		$	4,176		$	3,622
Research, development and engineering	16,785			11,699			8,071
Selling, general and administrative	36,318			26,059			22,266
Stock-based compensation expense included in operating expenses	53,103			37,758			30,337
Total stock-based compensation	57,095			41,934			33,959
Income tax benefit	(7,369		)	(9,891		)	(7,880		)
Total stock-based compensation expense, net of tax	$	49,726		$	32,043		$	26,079

Summary of Stock Option Activity

The following is a summary of the Company’s stock option activity during Fiscal Year 2020:

	Options Outstanding
	Number of Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life	Aggregate Intrinsic Value
	(in thousands)				(in years)	(in thousands)
Outstanding at March 30, 2019	627		$	48.66
Options granted	—		$	—
Options exercised	(19	)	$	39.91
Options forfeited or expired	(256	)	$	51.04
Outstanding at March 28, 2020	352		$	47.39	2.3	$	—
Vested or expected to vest at March 28, 2020	352		$	47.39	2.3	$	—
Exercisable at March 28, 2020	351		$	47.38	2.3	$	—

Summary of Restricted Stock Activity

The following table summarizes the changes in unvested restricted stock and RSUs, for Fiscal Year 2020:

	Number of Shares		Weighted Average Grant Date Fair Value
	(in thousands)
Unvested at March 30, 2019	1,473		$	61.64
Granted	1,376		$	33.77
Vested	(648	)	$	58.95
Forfeited	(290	)	$	53.54
Non-vested at March 28, 2020	1,911		$	43.71

Valuation Assumptions

The Company estimates the fair value of stock options and ESPP shares using a Black-Scholes option valuation model.  At the date of grant, the Company estimated the fair value of each stock option grant and purchase right granted under the ESPP using the following weighted average assumptions:

	Employee Stock Options					ESPP
Fiscal Year Ended March 31,	2020	2019	2018			2020			2019			2018
Expected volatility	n/a	n/a	29.1		%	67.0		%	40.8		%	30.5		%
Risk-free interest rate	n/a	n/a	1.7		%	1.7		%	2.4		%	1.5		%
Expected dividends	n/a	n/a	1.2		%	3.1		%	1.1		%	1.2		%
Expected life (in years)	n/a	n/a	4.6			0.5			0.5			0.5
Weighted-average grant date fair value	n/a	n/a	$	12.58		$	6.64		$	14.44		$	11.78