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Geographic Information Segment Reporting (Details) (USD $)
In Thousands, 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
Net sales                      
Consolidated total $ 65,738 $ 68,235 $ 68,317 $ 67,213 $ 64,505 $ 67,863 $ 69,830 $ 71,364 $ 269,503 $ 273,562 $ 300,399
Operating income (expense)                      
Severance expenses     (6,800)           (837) (8,021) (1,614)
Gain (loss) on sale of assets 1,600   2,100           4 3,721 (22)
Goodwill impairment     (28,300)           0 (28,306) 0
Other operating income (expense)                 (2,528) 0 (1,200)
Operating income (expense)                 (5,863) (45,267) (5,776)
Interest expense                 (1,097) (775) (681)
Other income (expense), net                 (162) (56) 101
Income (loss) from continuing operations before income taxes                 (7,122) (46,098) (6,356)
Capital expenditures                 2,908 18,320 11,066
Depreciation and amortization                 9,030 7,119 5,410
Total assets $ 159,945       $ 172,931       $ 159,945 $ 172,931