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Business Segment Information (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Income from Operations (loss) by business segment
Net operating income	$ 3,338	$ 3,747
Engineered Equipment Technology and Parts [Member]
Income from Operations (loss) by business segment
Net operating income	4,280	3,305
Contracting / Services [Member]
Income from Operations (loss) by business segment
Net operating income	573	1,121
Component Parts [Member]
Income from Operations (loss) by business segment
Net operating income	920	1,089
Corporate and other [Member]
Income from Operations (loss) by business segment
Net operating income	(2,465)	(1,695)
Eliminations [Member]
Income from Operations (loss) by business segment
Net operating income	$ 30	$ (73)

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- Definition

The net result for the period of deducting operating expenses from operating revenues.

+ References

No definition available.

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