Segment Reporting (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2012	Jun. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Net sales
Consolidated total	$ 71,984		$ 75,366	$ 222,294	$ 242,099
Operating income (expense)
Gain on sale of assets	11			2,133
Impairment loss		(28,300)		(28,306)
Operating income (expense)	(1,350)		(3,071)	(45,620)	2,266
Other income (expense), net	23		59	(73)	138
Interest expense	(229)		(79)	(453)	(662)
Income (loss) from continuing operations before income taxes	(1,556)		(3,091)	(46,146)	1,742
MRO [Member]
Net sales
Consolidated total	67,863		71,490	209,057	231,370
Operating income (expense)
Operating income (expense)	(1,710)		(3,422)	(20,993)	1,634
OEM [Member]
Net sales
Consolidated total	4,121		3,876	13,237	10,729
Operating income (expense)
Operating income (expense)	$ 349		$ 351	$ 1,546	$ 632