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Summary of Unaudited Quarterly Results of Operations (Details) (USD $)
 3 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Selected Quarterly Financial Information [Abstract]                      
Net sales $ 68,193,000 $ 71,984,000 $ 74,348,000 $ 75,962,000 $ 72,860,000 $ 75,366,000 $ 84,154,000 $ 82,579,000 $ 290,487,000 $ 314,959,000 $ 316,780,000
Gross profit 39,672,000 43,360,000 36,816,000 41,334,000 38,993,000 42,546,000 48,299,000 49,939,000 161,182,000 179,777,000 194,826,000
Continuing operations 1,524,000 [1] (1,316,000) [1] (61,140,000) [1] (1,785,000) [1] (5,373,000) [2] (2,154,000) [2] 1,088,000 [2] 2,050,000 [2] (62,717,000) (4,389,000) 9,590,000
Income (loss) from discontinued operations 199,000 (2,000) (17,000) (13,000) (174,000) (9,000) (22,000) (30,000) 167,000 (235,000) (2,653,000)
Net income (loss) 1,723,000 (1,318,000) (61,157,000) (1,798,000) (5,547,000) (2,163,000) 1,066,000 2,020,000 (62,550,000) (4,624,000) 6,937,000
Basic income (loss) per share of common stock:                      
Continuing operations $ 0.18 $ (0.15) $ (7.12) $ (0.21) $ (0.63) [3] $ (0.25) [3] $ 0.13 [3] $ 0.24 [3] $ (7.30) $ (0.51) $ 1.13
Discontinued operations $ 0.02 [3] $ 0.00 [3] $ 0.00 [3] $ 0.00 [3] $ (0.02) [3] $ 0.00 [3] $ (0.01) [3] $ 0.00 [3] $ 0.02 $ (0.03) $ (0.32)
Net income (loss) $ 0.20 [3] $ (0.15) [3] $ (7.12) [3] $ (0.21) [3] $ (0.65) [3] $ (0.25) [3] $ 0.12 [3] $ 0.24 [3] $ (7.28) $ (0.54) $ 0.81
Diluted income (loss) per share of common stock:                      
Continuing operations $ 0.18 $ (0.15) $ (7.12) $ (0.21) $ (0.63) [3] $ (0.25) [3] $ 0.13 [3] $ 0.24 [3] $ (7.30) $ (0.51) $ 1.12
Discontinued operations $ 0.02 [3] $ 0.00 [3] $ 0.00 [3] $ 0.00 [3] $ (0.02) [3] $ 0.00 [3] $ (0.01) [3] $ (0.01) [3] $ 0.02 $ (0.03) $ (0.31)
Net income (loss) $ 0.20 [3] $ (0.15) [3] $ (7.12) [3] $ (0.21) [3] $ (0.65) [3] $ (0.25) [3] $ 0.12 [3] $ 0.23 [3] $ (7.28) $ (0.54) $ 0.81
Other Disclosures [Abstract]                      
Gain from sale of assets 1,600,000   2,100,000                
Goodwill impairment     28,300,000           28,306,000 0 0
Severance expenses     6,800,000           8,021,000 1,614,000 3,629,000
Increase in deferred tax asset valuation allowance     33,500,000           33,300,000    
Estimated cost of settling an employment tax matter         800,000       0 1,200,000 0
Impairment of long-lived assets         $ 800,000       $ 0 $ 1,146,000 $ 0
[1] Income from operations for the three month ended December 31, 2012 includes a $1.6 million gain from sale of assets. Loss from continuing operations for the three months ended June 30, 2012 includes a $28.3 million charge for goodwill impairment, a $2.1 million gain on sale of assets, $6.8 million of severance expenses and a $33.5 million increase in deferred tax asset valuation allowance.
[2] Loss from continuing operations for the three months ended December 31, 2011 includes an $0.8 million net expense for the estimated cost of settling an employment tax matter and a net $0.8 million asset impairment charge.
[3] The sum of the quarterly earnings per share amounts may not equal the total annual earnings per share due to rounding and the uneven timing of earnings throughout the year compared to the weighted average shares outstanding.