Income (Loss) Per Share - Numerators and Denominators of Basic and Diluted Net Income (Loss) Per Share Computations (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2013	Sep. 28, 2012	Sep. 27, 2013	Sep. 28, 2012
Numerator:
Income (Loss) from continuing operations	$ 36,675	$ (4,469)	$ 23,768	$ (17,079)
Income (loss) from discontinued operations	91	(3,761)	15,619	1,338
Net income (loss)	$ 36,766	$ (8,230)	$ 39,387	$ (15,741)
Denominator:
Weighted average number of common shares outstanding Basic	101,144	116,517	108,695	116,946
Effect of dilutive securities from stock options, restricted stock units and ESPP	1,579	0	1,184	0
Weighted average number of common shares outstanding Diluted	102,723	116,517	109,879	116,946
Basic net income (loss) per share from:
Continuing operations (usd per share)	$ 0.36	$ (0.04)	$ 0.22	$ (0.15)
Discontinued operations (usd per share)	$ 0.00	$ (0.03)	$ 0.14	$ 0.01
Net income (loss) (usd per share)	$ 0.36	$ (0.07)	$ 0.36	$ (0.13)
Diluted net income (loss) per share from:
Continuing operations (usd per share)	$ 0.36	$ (0.04)	$ 0.22	$ (0.15)
Discontinued operations (usd per share)	$ 0.00	$ (0.03)	$ 0.14	$ 0.01
Net Income (loss) (usd per share)	$ 0.36	$ (0.07)	$ 0.36	$ (0.13)