Acquisitions - Pro Forma Information (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Feb. 28, 2013 Nuclear Logistics Incorporated [Member]	Feb. 29, 2012 Nuclear Logistics Incorporated [Member]	Feb. 28, 2014 Aquilex [Member]	Feb. 28, 2013 Aquilex [Member]
Summary of acquisitions
Net Sales	$ 583,743	$ 522,678	$ 774,818	$ 783,126
Net Income	$ 60,602	$ 43,283	$ 60,080	$ 58,372
Earnings Per Common Share
Basic Earnings Per Share (usd per share)	$ 2.39	$ 1.72	$ 2.35	$ 2.31
Diluted Earnings Per Share (usd per share)	$ 2.37	$ 1.71	$ 2.34	$ 2.28