Business Segment Information (Details 4) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Intra-segment and Inter-segment Revenues
Net sales	$ 34,361	$ 33,026
Intra and Inter-Segment [Member]
Intra-segment and Inter-segment Revenues
Sales revenue net excluding inter-segment eliminations	35,785	35,442
Inter-segment Elimination [Member]
Intra-segment and Inter-segment Revenues
Segment reporting intra-segment sales	(411)	(1,082)
Intra-segment [Member]
Intra-segment and Inter-segment Revenues
Inter-segment Sales Purchases by Engineered Equipment Technology and Parts Segment	(983)	(434)
Inter-segment Sales Purchases by Contracting or Services Segment	(203)	(858)
Inter-segment Sales Purchases by Component Parts Segment
Inter-segment Sales Purchases by Corporate and other	173	(42)
Engineered Equipment Technology and Parts [Member]
Intra-segment and Inter-segment Revenues
Net sales	25,010	20,890
Revenue from External Customers	25,010	20,890
Engineered Equipment Technology and Parts [Member] \| Intra and Inter-Segment [Member]
Intra-segment and Inter-segment Revenues
Net sales	25,218	22,425
Engineered Equipment Technology and Parts [Member] \| Inter-segment Elimination [Member]
Intra-segment and Inter-segment Revenues
Segment reporting intra-segment sales	(208)	(970)
Engineered Equipment Technology and Parts [Member] \| Intra-segment [Member]
Intra-segment and Inter-segment Revenues
Inter-segment Sales Purchases by Engineered Equipment Technology and Parts Segment
Inter-segment Sales Purchases by Contracting or Services Segment		(565)
Inter-segment Sales Purchases by Component Parts Segment
Inter-segment Sales Purchases by Corporate and other
Engineered Equipment Technology and Parts [Member] \| United States [Member]
Intra-segment and Inter-segment Revenues
Net sales	19,195	18,109
Revenue from External Customers	19,195	18,109
Engineered Equipment Technology and Parts [Member] \| United States [Member] \| Intra and Inter-Segment [Member]
Intra-segment and Inter-segment Revenues
Net sales	19,393	18,921
Engineered Equipment Technology and Parts [Member] \| United States [Member] \| Inter-segment Elimination [Member]
Intra-segment and Inter-segment Revenues
Segment reporting intra-segment sales	(198)	(247)
Engineered Equipment Technology and Parts [Member] \| United States [Member] \| Intra-segment [Member]
Intra-segment and Inter-segment Revenues
Inter-segment Sales Purchases by Engineered Equipment Technology and Parts Segment
Inter-segment Sales Purchases by Contracting or Services Segment		(565)
Inter-segment Sales Purchases by Component Parts Segment
Inter-segment Sales Purchases by Corporate and other
Engineered Equipment Technology and Parts [Member] \| Netherlands [Member]
Intra-segment and Inter-segment Revenues
Net sales	2,114
Revenue from External Customers	2,114
Engineered Equipment Technology and Parts [Member] \| Netherlands [Member] \| Intra and Inter-Segment [Member]
Intra-segment and Inter-segment Revenues
Net sales	2,114
Engineered Equipment Technology and Parts [Member] \| Netherlands [Member] \| Inter-segment Elimination [Member]
Intra-segment and Inter-segment Revenues
Segment reporting intra-segment sales
Engineered Equipment Technology and Parts [Member] \| Netherlands [Member] \| Intra-segment [Member]
Intra-segment and Inter-segment Revenues
Inter-segment Sales Purchases by Engineered Equipment Technology and Parts Segment
Inter-segment Sales Purchases by Contracting or Services Segment
Inter-segment Sales Purchases by Component Parts Segment
Inter-segment Sales Purchases by Corporate and other
Engineered Equipment Technology and Parts [Member] \| Canada [Member]
Intra-segment and Inter-segment Revenues
Net sales	1,747	1,940
Revenue from External Customers	1,747	1,940
Engineered Equipment Technology and Parts [Member] \| Canada [Member] \| Intra and Inter-Segment [Member]
Intra-segment and Inter-segment Revenues
Net sales	1,757	1,940
Engineered Equipment Technology and Parts [Member] \| Canada [Member] \| Inter-segment Elimination [Member]
Intra-segment and Inter-segment Revenues
Segment reporting intra-segment sales	(10)
Engineered Equipment Technology and Parts [Member] \| Canada [Member] \| Intra-segment [Member]
Intra-segment and Inter-segment Revenues
Inter-segment Sales Purchases by Engineered Equipment Technology and Parts Segment
Inter-segment Sales Purchases by Contracting or Services Segment
Inter-segment Sales Purchases by Component Parts Segment
Inter-segment Sales Purchases by Corporate and other
Engineered Equipment Technology and Parts [Member] \| China [Member]
Intra-segment and Inter-segment Revenues
Net sales	1,954	720
Revenue from External Customers	1,954	720
Engineered Equipment Technology and Parts [Member] \| China [Member] \| Intra and Inter-Segment [Member]
Intra-segment and Inter-segment Revenues
Net sales	1,954	1,443
Engineered Equipment Technology and Parts [Member] \| China [Member] \| Inter-segment Elimination [Member]
Intra-segment and Inter-segment Revenues
Segment reporting intra-segment sales		(723)
Engineered Equipment Technology and Parts [Member] \| China [Member] \| Intra-segment [Member]
Intra-segment and Inter-segment Revenues
Inter-segment Sales Purchases by Engineered Equipment Technology and Parts Segment
Inter-segment Sales Purchases by Contracting or Services Segment
Inter-segment Sales Purchases by Component Parts Segment
Inter-segment Sales Purchases by Corporate and other
Engineered Equipment Technology and Parts [Member] \| Brazil [Member]
Intra-segment and Inter-segment Revenues
Net sales	0	121
Revenue from External Customers		121
Engineered Equipment Technology and Parts [Member] \| Brazil [Member] \| Intra and Inter-Segment [Member]
Intra-segment and Inter-segment Revenues
Net sales		121
Engineered Equipment Technology and Parts [Member] \| Brazil [Member] \| Intra-segment [Member]
Intra-segment and Inter-segment Revenues
Inter-segment Sales Purchases by Component Parts Segment
Contracting / Services [Member]
Intra-segment and Inter-segment Revenues
Net sales	4,119	7,082
Revenue from External Customers	4,119	7,082
Contracting / Services [Member] \| Intra and Inter-Segment [Member]
Intra-segment and Inter-segment Revenues
Net sales	5,135	7,545
Contracting / Services [Member] \| Inter-segment Elimination [Member]
Intra-segment and Inter-segment Revenues
Segment reporting intra-segment sales	(44)	(34)
Contracting / Services [Member] \| Intra-segment [Member]
Intra-segment and Inter-segment Revenues
Inter-segment Sales Purchases by Engineered Equipment Technology and Parts Segment	(972)	(429)
Inter-segment Sales Purchases by Contracting or Services Segment
Inter-segment Sales Purchases by Component Parts Segment
Inter-segment Sales Purchases by Corporate and other
Component Parts [Member]
Intra-segment and Inter-segment Revenues
Net sales	5,059	5,082
Revenue from External Customers	5,059	5,082
Component Parts [Member] \| Intra and Inter-Segment [Member]
Intra-segment and Inter-segment Revenues
Net sales	5,432	5,448
Component Parts [Member] \| Inter-segment Elimination [Member]
Intra-segment and Inter-segment Revenues
Segment reporting intra-segment sales	(159)	(78)
Component Parts [Member] \| Intra-segment [Member]
Intra-segment and Inter-segment Revenues
Inter-segment Sales Purchases by Engineered Equipment Technology and Parts Segment	(11)	(5)
Inter-segment Sales Purchases by Contracting or Services Segment	(203)	(283)
Inter-segment Sales Purchases by Component Parts Segment
Inter-segment Sales Purchases by Corporate and other
Corporate and other [Member]
Intra-segment and Inter-segment Revenues
Revenue from External Customers	173	(28)
Corporate and other [Member] \| Intra and Inter-Segment [Member]
Intra-segment and Inter-segment Revenues
Net sales		24
Corporate and other [Member] \| Inter-segment Elimination [Member]
Intra-segment and Inter-segment Revenues
Segment reporting intra-segment sales
Corporate and other [Member] \| Intra-segment [Member]
Intra-segment and Inter-segment Revenues
Inter-segment Sales Purchases by Engineered Equipment Technology and Parts Segment
Inter-segment Sales Purchases by Contracting or Services Segment		(10)
Inter-segment Sales Purchases by Component Parts Segment
Inter-segment Sales Purchases by Corporate and other	$ 173	$ (42)