Acquisitions (Details Textual) (USD $)			0 Months Ended		3 Months Ended
	May 31, 2014	Feb. 28, 2014	Mar. 29, 2013 Aquilex [Member]	Jun. 02, 2012 Aquilex [Member]	May 31, 2014 Customer Related Intangibles [Member] Aquilex [Member]	May 31, 2014 Trade Names [Member] Aquilex [Member]	May 31, 2014 Minimum [Member] Developed Technology Rights [Member] Aquilex [Member]	May 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			$ 87,100,000	$ 87,100,000
Payments to Acquire Businesses, Gross			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	279,735,091	278,556,040	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					14 years	19 years	3 years	9 years