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Segment Reporting Segment Reporting (Details) (USD $) In Thousands, unless otherwise specified | 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 Segment | Dec. 31, 2011 | Dec. 31, 2010
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of Operating Segments |  |  |  |  |  |  |  |  | 2 |  |
Net sales |  |  |  |  |  |  |  |  |  |  |
Consolidated total | $ 68,193 | $ 71,984 | $ 74,348 | $ 75,962 | $ 72,860 | $ 75,366 | $ 84,154 | $ 82,579 | $ 290,487 | $ 314,959 | $ 316,780
Operating income (expense) |  |  |  |  |  |  |  |  |  |  |
Severance expenses |  |  | (6,800) |  |  |  |  |  | (8,021) | (1,614) | (3,629)
Gain (loss) on sale of assets |  |  |  |  |  |  |  |  | 3,721 | (22) | 1,701
Goodwill impairment |  |  | (28,300) |  |  |  |  |  | (28,306) | 0 | 0
Other operating income (expense) |  |  |  |  |  |  |  |  | 0 | (2,346) | 4,050
Operating income (expense) |  |  |  |  |  |  |  |  | (43,149) | (5,496) | 16,927
Interest expense |  |  |  |  |  |  |  |  | (775) | (681) | (391)
Other income (expense), net |  |  |  |  |  |  |  |  | (56) | 101 | 160
Income (loss) from continuing operations before income taxes |  |  |  |  |  |  |  |  | (43,980) | (6,076) | 16,696
Capital expenditures |  |  |  |  |  |  |  |  | 18,501 | 11,132 | 10,048
Depreciation and amortization |  |  |  |  |  |  |  |  | 7,134 | 5,704 | 6,306
Total assets | 172,931 |  |  |  | 222,748 |  |  |  | 172,931 | 222,748 | 236,384
MRO [Member] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |
Consolidated total |  |  |  |  |  |  |  |  | 273,562 | 300,399 | 303,138
Operating income (expense) |  |  |  |  |  |  |  |  |  |  |
Operating income (expense) |  |  |  |  |  |  |  |  | (12,461) | (2,466) | 14,522
Capital expenditures |  |  |  |  |  |  |  |  | 18,127 | 11,066 | 10,038
Depreciation and amortization |  |  |  |  |  |  |  |  | 7,085 | 5,342 | 5,900
Total assets | 162,011 |  |  |  | 194,422 |  |  |  | 162,011 | 194,422 | 210,273
OEM [Member] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |
Consolidated total |  |  |  |  |  |  |  |  | 16,925 | 14,560 | 13,642
Operating income (expense) |  |  |  |  |  |  |  |  |  |  |
Operating income (expense) |  |  |  |  |  |  |  |  | 1,918 | 952 | 283
Capital expenditures |  |  |  |  |  |  |  |  | 374 | 66 | 10
Depreciation and amortization |  |  |  |  |  |  |  |  | 49 | 362 | 406
Total assets | 10,498 |  |  |  | 10,336 |  |  |  | 10,498 | 10,336 | 9,749
Segment Net [Member] |  |  |  |  |  |  |  |  |  |  |
Operating income (expense) |  |  |  |  |  |  |  |  |  |  |
Total assets | 172,509 |  |  |  | 204,758 |  |  |  | 172,509 | 204,758 | 220,022
Corporate [Member] |  |  |  |  |  |  |  |  |  |  |
Operating income (expense) |  |  |  |  |  |  |  |  |  |  |
Total assets | 72 |  |  |  | 17,580 |  |  |  | 72 | 17,580 | 15,743
Discontinued Operations [Member] |  |  |  |  |  |  |  |  |  |  |
Operating income (expense) |  |  |  |  |  |  |  |  |  |  |
Total assets | $ 350 |  |  |  | $ 410 |  |  |  | $ 350 | $ 410 | $ 619

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