CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income	Retained Earnings	Treasury Stock
Common stock, shares, beginning of period at Mar. 31, 2017		33,416,000
Stockholders' equity, beginning of period at Mar. 31, 2017	$ 382,156	$ 804	$ 818,777	$ 4,694	$ 319,931	$ (762,050)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(869)				(869)
Foreign currency translation adjustments	257			257
Net unrealized gains (losses) on cash flow hedges, net of tax	(2,190)			(2,190)
Net unrealized gains (losses) on investments, net of tax	109			109
Proceeds from issuances under stock-based compensation plans, shares		1,288,000
Proceeds from issuances under stock-based compensation plans	23,927	$ 12	23,915
Repurchase of restricted common stock, shares		(98,000)
Repurchase of restricted common stock	0
Cash dividends	(19,996)				(19,996)
Stock-based compensation	33,959		33,959
Repurchase of common stock, shares		(1,140,000)
Repurchase of common stock	(52,948)					(52,948)
Employees' tax withheld and paid for restricted stock and restricted stock units, shares		(215,000)
Employees' tax withheld and paid for restricted stock and restricted stock units	$ (11,429)					(11,429)
Shares issued under the ESPP	156,355
Other equity changes related to compensation	$ (6)		(6)
Common stock, shares, end of period at Mar. 31, 2018		33,251,000
Stockholders' equity, end of period at Mar. 31, 2018	352,970	$ 816	876,645	2,870	299,066	(826,427)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(135,561)				(135,561)
Foreign currency translation adjustments	150			150
Net unrealized gains (losses) on cash flow hedges, net of tax	(3,371)			(3,371)
Proceeds from issuances under stock-based compensation plans, shares		576,000
Proceeds from issuances under stock-based compensation plans	18,720	$ 4	18,716
Repurchase of restricted common stock, shares		(93,000)
Repurchase of restricted common stock	0
Issuance of common stock for acquisition, shares		6,352,000
Issuance of common stock for acquisition	494,265	$ 64	494,201
Cash dividends	(22,880)				(22,880)
Stock-based compensation	$ 41,934		41,934
Repurchase of common stock, shares	(361,091)	(361,000)
Repurchase of common stock	$ (13,177)					(13,177)
Employees' tax withheld and paid for restricted stock and restricted stock units, shares		(207,000)
Employees' tax withheld and paid for restricted stock and restricted stock units	$ (14,070)					(14,070)
Shares issued under the ESPP	138,133
Other equity changes related to compensation	$ 112		112
Common stock, shares, end of period at Mar. 30, 2019		39,518,000
Stockholders' equity, end of period at Mar. 30, 2019	721,687	$ 884	1,431,608	(475)	143,344	(853,674)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(827,182)				(827,182)
Foreign currency translation adjustments	(220)			(220)
Net unrealized gains (losses) on cash flow hedges, net of tax	(12,887)			(12,887)
Proceeds from issuances under stock-based compensation plans, shares		426,000
Proceeds from issuances under stock-based compensation plans	757	$ 6	751
Repurchase of restricted common stock, shares		(40,000)
Repurchase of restricted common stock	0
Cash dividends	(23,970)				(23,970)
Stock-based compensation	$ 57,094		57,094
Repurchase of common stock, shares	0
Employees' tax withheld and paid for restricted stock and restricted stock units, shares		234,000
Employees' tax withheld and paid for restricted stock and restricted stock units	$ (9,892)					(9,892)
Shares issued under the ESPP	736,184	736,000
Stock Issued During Period, Value, Employee Stock Purchase Plan	$ 11,893	$ 6	11,887
Other equity changes related to compensation	(7)				(7)
Common stock, shares, end of period at Mar. 28, 2020		40,406,000
Stockholders' equity, end of period at Mar. 28, 2020	$ (82,816)	$ 896	$ 1,501,340	$ (13,582)	$ (707,904)	$ (863,566)