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Quarterly Financial Data - Condensed Consolidated Statement of Operations (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Interim Reporting [Line Items]                      
Net sales $ 106,143 $ 92,738 $ 98,280 $ 103,373 $ 117,365 $ 107,857 $ 113,423 $ 108,936 $ 400,534 $ 447,581 $ 441,971
Cost of sales 32,517 23,920 20,246 25,617 24,944 24,384 27,547 21,378 102,300 98,253 95,527
Gross profit 73,626 68,818 78,034 77,756 92,421 83,473 85,876 87,558 298,234 349,328 346,444
Operating Expense 80,004 84,418 69,230 69,669 66,808 64,668 71,578 69,638 303,321 272,692 340,544
Operating (loss) income 6,378 (15,600) 8,804 8,087 25,613 18,805 14,298 17,920 (5,087) 76,636 5,900
Net income (loss) from continuing operations (8,564) (18,084) 4,130 7,610 16,009 10,574 9,870 8,597 (14,908) 45,050 (16,218)
Net (loss) income (7,876) (19,822) (2,317) 4,500 21,161 5,016 7,254 9,407 (25,515) 42,838 (18,110)
Basic:                      
Net income (loss) from continuing operations $ (0.47) $ (1.00) $ 0.22 $ 0.39 $ 0.83 $ 0.55 $ 0.52 $ 0.46 $ (0.80) $ 2.37 $ (0.89)
Net income (loss) $ (0.43) $ (1.10) $ (0.12) $ 0.23 $ 1.10 $ 0.26 $ 0.38 $ 0.50 $ (1.37) $ 2.25 $ (0.99)
Diluted:                      
Net income (loss) from continuing operations $ (0.47) $ (1.00) $ 0.21 $ 0.39 $ 0.81 $ 0.54 $ 0.51 $ 0.45 $ (0.80) $ 2.32 $ (0.89)
Net income (loss) $ (0.43) $ (1.10) $ (0.12) $ 0.23 $ 1.07 $ 0.25 $ 0.37 $ 0.49 $ (1.37) $ 2.21 $ (0.99)
As Previously or Currently Reported [Member]
                      
Interim Reporting [Line Items]                      
Net sales          100,254 112,035 114,752 119,492 116,041    462,320 470,121
Cost of sales          22,699 18,504 22,373 23,676 21,939    86,492 92,619
Gross profit          77,555 93,531 92,379 95,816 94,102    375,828 377,502
Operating Expense          73,531 69,050 70,846 75,251 71,671    286,818 346,193
Operating (loss) income          4,024 24,481 21,533 20,565 22,431    89,010 31,309
Net income (loss) from continuing operations          4,908 14,636 13,118 13,967 12,215    53,936 (1,740)
Net (loss) income          2,116 20,514 7,560 11,205 12,016    51,295  
Basic:                      
Net income (loss) from continuing operations          $ 0.25 $ 0.76 $ 0.69 $ 0.74 $ 0.65    $ 2.84 $ (0.10)
Net income (loss)          $ 0.11 $ 1.06 $ 0.40 $ 0.59 $ 0.64    $ 2.70 $ (0.06)
Diluted:                      
Net income (loss) from continuing operations          $ 0.25 $ 0.74 $ 0.67 $ 0.73 $ 0.64    $ 2.78 $ (0.10)
Net income (loss)          $ 0.11 $ 1.04 $ 0.39 $ 0.58 $ 0.63    $ 2.64 $ (0.06)
Restatement Adjustments [Member]
                      
Interim Reporting [Line Items]                      
Net sales          3,119 5,330 (6,895) (6,069) (7,105)    (14,739) (28,150)
Cost of sales          2,918 6,440 2,011 3,871 (561)    11,761 2,908
Gross profit          201 (1,110) (8,906) (9,940) (6,544)    (26,500) (31,058)
Operating Expense          (3,862) (2,242) (6,178) (3,673) (2,033)    (14,126) (5,649)
Operating (loss) income          4,063 1,132 (2,728) (6,267) (4,511)    (12,374) (25,409)
Net income (loss) from continuing operations          2,702 1,373 (2,544) (4,097) (3,618)    (8,886) (14,478)
Net (loss) income          $ 2,384 $ 647 $ (2,544) $ (3,951) $ (2,609)    $ (8,457)  
Basic:                      
Net income (loss) from continuing operations          $ 0.14 $ 0.07 $ (0.14) $ (0.22) $ (0.19)    $ (0.47) $ (0.79)
Net income (loss)          $ 0.12 $ 0.04 $ (0.14) $ (0.21) $ (0.14)    $ (0.45) $ (0.93)
Diluted:                      
Net income (loss) from continuing operations          $ 0.14 $ 0.07 $ (0.13) $ (0.22) $ (0.19)    $ (0.46) $ (0.79)
Net income (loss)          $ 0.12 $ 0.03 $ (0.14) $ (0.21) $ (0.14)    $ (0.43) $ (0.93)