Net 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								12 Months Ended
	Dec. 31, 2013	Sep. 27, 2013	Jun. 28, 2013	Mar. 29, 2013	Dec. 31, 2012	Sep. 28, 2012	Jun. 29, 2012	Mar. 30, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Numerator:
Income (loss) from continuing operations	$ (2,179)	$ 36,675	$ (3,404)	$ (9,503)	$ 890	$ (4,469)	$ (3,875)	$ (8,735)	$ 21,589	$ (16,189)	$ 2,018
Income (loss) from discontinued operations	(181)	91	(396)	15,924	3,914	(3,761)	3,892	1,207	15,438	5,252	6,761
Net income (loss)	$ (2,360)	$ 36,766	$ (3,800)	$ 6,421	$ 4,804	$ (8,230)	$ 17	$ (7,528)	$ 37,027	$ (10,937)	$ 8,779
Denominator:
Weighted average shares outstanding - basic	100,372	101,144	109,938	115,219	115,097	116,517	117,056	117,275	106,529	116,457	115,175
Effect of dilutive securities from stock options, restricted stock units and ESPP									1,279	0	1,252
Diluted (in shares)	100,372	102,723	109,938	115,219	115,732	116,517	117,056	117,275	107,808	116,457	116,427
Basic net income (loss) per share from:
Continuing operations, basic (usd per share)	$ (0.02)	$ 0.36	$ (0.03)	$ (0.08)	$ 0.01	$ (0.04)	$ (0.03)	$ (0.07)	$ 0.20	$ (0.14)	$ 0.02
Discontinued operations, basic (usd per share)	$ 0.00	$ 0.00	$ 0.00	$ 0.14	$ 0.03	$ (0.03)	$ 0.03	$ 0.01	$ 0.14	$ 0.05	$ 0.06
Net income (loss) per share - basic	$ (0.02)	$ 0.36	$ (0.03)	$ 0.06	$ 0.04	$ (0.07)	$ 0.00	$ (0.06)	$ 0.35	$ (0.09)	$ 0.08
Diluted net income (loss) per share from:
Continuing operations, diluted (usd per share)	$ (0.02)	$ 0.36	$ (0.03)	$ (0.08)	$ 0.01	$ (0.04)	$ (0.03)	$ (0.07)	$ 0.20	$ (0.14)	$ 0.02
Discontinued operations, diluted (usd per share)	$ 0.00	$ 0.00	$ 0.00	$ 0.14	$ 0.03	$ (0.03)	$ 0.03	$ 0.01	$ 0.14	$ 0.05	$ 0.06
Net income (loss) per share - diluted	$ (0.02)	$ 0.36	$ (0.03)	$ 0.06	$ 0.04	$ (0.07)	$ 0.00	$ (0.06)	$ 0.34	$ (0.09)	$ 0.08