Net Income Per Share From Continuing Operations (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Mar. 29, 2015	Dec. 28, 2014	Sep. 28, 2014	Jun. 29, 2014	Mar. 30, 2014	Dec. 29, 2013	Sep. 29, 2013	Jun. 30, 2013	Mar. 29, 2015	Mar. 30, 2014	Mar. 31, 2013
Numerator (basic and diluted):
Net income from continuing operations	$ 40,383	$ 32,841	$ 24,246	$ 17,111	$ 5,062	$ 17,339	$ 87,411	$ 1,501	$ 114,581	$ 111,313	$ 2,711
Denominator:
Weighted average common shares outstanding, basic (in shares)									148,714	149,480	144,014
Dilutive effect of employee stock options and restricted stock units (in shares)									5,269	3,889	1,664
Weighted average common shares outstanding, diluted (in shares)									153,983	153,369	145,678
Basic net income per share - continuing operations (in dollars per share)	$ 0.27	$ 0.22	$ 0.16	$ 0.11	$ 0.03	$ 0.11	$ 0.58	$ 0.01	$ 0.77	$ 0.74	$ 0.02
Diluted net income per share - continuing operations (in dollars per share)	$ 0.26	$ 0.21	$ 0.16	$ 0.11	$ 0.03	$ 0.11	$ 0.57	$ 0.01	$ 0.74	$ 0.73	$ 0.02
Shares excluded from calculation because they were anti-dilutive (in shares)									11	1,500	12,000