Net Income Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2012	Oct. 02, 2011	Sep. 30, 2012	Oct. 02, 2011
Numerator (basic and diluted):
Net income (loss) from continuing operations	$ (683)	$ 8,100	$ (140)	$ 20,869
Denominator:
Weighted average common shares outstanding, basic (in shares)	143,519,000	144,682,000	143,055,000	146,249,000
Dilutive effect of employee stock options and restricted stock units (in shares)	0	1,487,000	0	2,437,000
Weighted average common shares outstanding, diluted (in shares)	143,519,000	146,169,000	143,055,000	148,686,000
Basic net income per share - continuing operations (in dollars per share)	$ 0.00	$ 0.06	$ 0.00	$ 0.14
Diluted net income per share - continuing operations (in dollars per share)	$ 0.00	$ 0.06	$ 0.00	$ 0.14
Shares excluded from calculation because they were anti-dilutive (in shares)	17,600,000	14,600,000	17,700,000	11,400,000