XML 40 R26.htm IDEA: XBRL DOCUMENT

Investments in Foreign Joint Ventures (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013 JointVenture	Dec. 31, 2012
Investments in Foreign Joint Ventures (Textual) [Abstract]
Interest in joint venture foreign	3
Accumulated statutory reserves in equity method investments	$ 1.9	$ 1.6
BOMAY [Member]
Schedule of Equity Method Investments [Line Items]
Interest in Joint Venture	40.00%
MIEFE [Member]
Schedule of Equity Method Investments [Line Items]
Interest in Joint Venture	41.00%
AAG [Member]
Schedule of Equity Method Investments [Line Items]
Interest in Joint Venture	49.00%
Baoji Oilfield Machinery [Member]
Schedule of Equity Method Investments [Line Items]
Interest in Joint Venture	51.00%
Oakwell Engineering [Member]
Schedule of Equity Method Investments [Line Items]
Interest in Joint Venture	51.00%
LTDA [Member]
Schedule of Equity Method Investments [Line Items]
Interest in Joint Venture	51.00%
AA Energies [Member]
Schedule of Equity Method Investments [Line Items]
Interest in Joint Venture	9.00%
MIEFE's general manager [Member]
Schedule of Equity Method Investments [Line Items]
Interest in Joint Venture	8.00%