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Acquisitions - Purchase Price Allocation (Details) (USD $)	Feb. 28, 2015	Feb. 28, 2014	Feb. 28, 2013	Jun. 02, 2012
Purchase Price Allocation
Goodwill	$ 279,074,000us-gaap_Goodwill	$ 278,556,000us-gaap_Goodwill	$ 171,886,000us-gaap_Goodwill
Aquilex [Member]
Purchase Price Allocation
Current Assets				78,619,000
Property and Equipment				27,669,000
Intangible Assets				87,100,000
Goodwill				109,636,000
Other Assets				205,000
Total Assets Acquired				303,229,000
Current Liabilities				(27,527,000)
Net Assets Acquired				275,702,000
Nuclear Logistics Incorporated [Member]
Purchase Price Allocation
Current Assets				22,901,000
Property and Equipment				1,416,000
Intangible Assets				50,600,000
Goodwill				32,323,000
Other Assets				58,000
Total Assets Acquired				107,298,000
Current Liabilities				(17,866,000)
Long Term Liabilities				(12,388,000)
Net Assets Acquired				$ 77,044,000