Consolidated Statements of Stockholders' Equity (USD $)	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balance at Mar. 27, 2011	$ 4,000	$ (248,983,000)	$ 728,139,000	$ (234,294,000)	$ (287,000)	$ 244,579,000
Balance (in Shares) at Mar. 27, 2011	64,444,032	(19,924,369)
Net income (loss)				(28,056,000)		(28,056,000)
Change in unrealized gains on marketable securities					86,000	86,000
Shares issued through employee stock plans	1,000		3,144,000			3,145,000
Shares issued through employee stock plans (in Shares)	485,210					62,000
Shares issued in connection with acquisitions			24,000			24,000
Shares issued in connection with acquisitions (in Shares)	3,358
Shares issued for vested restricted stock units			16,000			16,000
Shares issued for vested restricted stock units (in Shares)	278,080
Withholding of shares for tax obligations on vested restricted stock units			(252,000)			(252,000)
Withholding of shares for tax obligations on vested restricted stock units (in Shares)	(41,078)
Repurchase of common stock						0
Stock-based compensation			3,750,000			3,750,000
Balance at Apr. 01, 2012	5,000	(248,983,000)	734,821,000	(262,350,000)	(201,000)	223,292,000
Balance (in Shares) at Apr. 01, 2012	65,169,602	(19,924,369)
Net income (loss)				2,882,000		2,882,000
Change in unrealized gains on marketable securities					(325,000)	(325,000)
Shares issued through employee stock plans			6,296,000			6,296,000
Shares issued through employee stock plans (in Shares)	903,772					26,000
Shares issued in connection with acquisitions			3,740,000			3,740,000
Shares issued in connection with acquisitions (in Shares)	357,873
Shares issued for vested restricted stock units (in Shares)	125,095
Withholding of shares for tax obligations on vested restricted stock units			(219,000)			(219,000)
Withholding of shares for tax obligations on vested restricted stock units (in Shares)	(24,727)
Repurchase of common stock						0
Stock-based compensation			4,788,000			4,788,000
Balance at Mar. 31, 2013	5,000	(248,983,000)	749,426,000	(259,468,000)	(526,000)	240,454,000
Balance (in Shares) at Mar. 31, 2013	66,531,615	(19,924,369)
Net income (loss)				5,801,000		5,801,000
Change in unrealized gains on marketable securities					(553,000)	(553,000)
Shares issued through employee stock plans			5,833,000			5,833,000
Shares issued through employee stock plans (in Shares)	805,527					20,000
Shares issued in connection with acquisitions			5,005,000			5,005,000
Shares issued in connection with acquisitions (in Shares)	438,995
Shares issued for vested restricted stock units			12,000			12,000
Shares issued for vested restricted stock units (in Shares)	346,407
Withholding of shares for tax obligations on vested restricted stock units			(1,149,000)			(1,149,000)
Withholding of shares for tax obligations on vested restricted stock units (in Shares)	(106,865)
Retirement of treasury shares		248,983,000	(248,983,000)
Retirement of treasury shares (in Shares)	(19,924,369)	19,924,369				755,000
Repurchase of common stock			(9,000,000)			(9,000,000)
Repurchase of common stock (in Shares)	(755,305)
Stock-based compensation			6,972,000			6,972,000
Balance at Mar. 30, 2014	$ 5,000		$ 508,116,000	$ (253,667,000)	$ (1,079,000)	$ 253,375,000
Balance (in Shares) at Mar. 30, 2014	47,336,005