Selected Quarterly Financial Data - Summary of Quarterly Financial Data (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 28, 2012	Jun. 29, 2012	Mar. 30, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 30, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Quarterly Financial Data [Line Items]
Net revenues	$ 133,427	$ 136,682	$ 132,634	$ 127,721	$ 143,630	$ 138,871	$ 133,996	$ 132,835
Gross profit	65,411	59,904	57,578	53,662	66,870	63,961	61,828	61,855	236,555	254,514	195,401
Income (loss) from operations	2,694	(949)	(2,395)	(8,657)	6,627	3,840	1,393	(87)	(9,307)	11,773	5,142
Net income (loss)	$ 4,804	$ (8,230)	$ 17	$ (7,528)	$ 4,327	$ 3,546	$ 390	$ 516	$ (10,937)	$ 8,779	$ (4,335)
Net income (loss) per share - basic	$ 0.04	$ (0.07)	$ 0.00	$ (0.06)	$ 0.04	$ 0.03	$ 0.00	$ 0.00	$ (0.09)	$ 0.08	$ (0.04)
Net income (loss) per share - diluted	$ 0.04	$ (0.07)	$ 0.00	$ (0.06)	$ 0.04	$ 0.03	$ 0.00	$ 0.00	$ (0.09)	$ 0.08	$ (0.04)