Acquisitions (Details Textual) (USD $)			0 Months Ended			6 Months Ended
	Aug. 31, 2014	Feb. 28, 2014	Jun. 30, 2014 Zalk Steel [Member]	Mar. 29, 2013 Aquilex [Member]	Jun. 02, 2012 Aquilex [Member]	Aug. 31, 2014 Customer Relationships [Member] Zalk Steel [Member]	Aug. 31, 2014 Customer-Related Intangible Assets [Member] Aquilex [Member]	Aug. 31, 2014 Trade Names [Member] Zalk Steel [Member]	Aug. 31, 2014 Trade Names [Member] Aquilex [Member]	Aug. 31, 2014 Noncompete Agreements [Member] Zalk Steel [Member]	Aug. 31, 2014 Minimum [Member] Developed Technology Rights [Member] Aquilex [Member]	Aug. 31, 2014 Maximum [Member] Developed Technology Rights [Member] Aquilex [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill			$ 3,800,000	$ 87,100,000	$ 87,100,000
Payments to Acquire Businesses, Gross			10,500,000	275,700,000
Business Acquisition Amount of Payment Due at Close under Purchase Agreement				271,800,000
Additional payment on performance				3,900,000
Acquisiton Related Costs Excluded From Pro Form Earnings				3,200,000
Goodwill	282,563,853	278,556,040	2,900,000	109,636,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets				$ 303,229,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life						19 years	14 years	19 years	19 years	5 years	3 years	9 years