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. 26, 2014	Sep. 27, 2013	Sep. 26, 2014	Sep. 27, 2013
Numerator:
Income (loss) from continuing operations	$ 1,078	$ 36,675	$ (41,394)	$ 23,768
Income from discontinued operations	0	91	0	15,619
Net income (loss)	$ 1,078	$ 36,766	$ (41,394)	$ 39,387
Denominator:
Basic	90,618	101,144	94,113	108,695
Effect of dilutive securities from stock options, restricted stock units and ESPP	1,182	1,579	0	1,184
Diluted	91,800	102,723	94,113	109,879
Basic net income (loss) per share from:
Continuing operations	$ 0.01	$ 0.36	$ (0.44)	$ 0.22
Discontinued operations	$ 0.00	$ 0.00	$ 0.00	$ 0.14
Net income (loss)	$ 0.01	$ 0.36	$ (0.44)	$ 0.36
Diluted net income (loss) per share from:
Continuing operations	$ 0.01	$ 0.36	$ (0.44)	$ 0.22
Discontinued operations	$ 0.00	$ 0.00	$ 0.00	$ 0.14
Net Income (loss)	$ 0.01	$ 0.36	$ (0.44)	$ 0.36