Net Income Per Share (Computation) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 03, 2016	Dec. 28, 2014	Jan. 03, 2016	Dec. 28, 2014	Oct. 29, 2015
Numerator (basic and diluted):
Net income from continuing operations	$ 32,545	$ 32,841	$ 113,688	$ 74,198
Denominator:
Weighted average common shares outstanding, basic (shares)	140,411	148,552	145,382	148,844
Dilutive effect of employee stock options and restricted stock units (shares)	5,294	5,421	5,232	5,060
Weighted average common shares outstanding, diluted (shares)	145,705	153,973	150,614	153,904
Basic net income per share from continuing operations (in dollars per share)	$ 0.23	$ 0.22	$ 0.78	$ 0.50
Diluted net income per share from continuing operations (in dollars per share)	$ 0.22	$ 0.21	$ 0.75	$ 0.48
Shares excluded from calculation because they were anti-dilutive (in shares)	400	22	400	300
0.875% Convertible Senior Notes Due 2022 | Convertible debt
Debt Instrument [Line Items]
Interest rate	0.875%		0.875%		0.875%
Stock price trigger to convert convertible debt (in dollars per share)			$ 33.45
Warrant
Debt Instrument [Line Items]
Debt Instrument Convertible, Warrant, Stock Price Trigger (in dollars per share)	$ 48.66		$ 48.66