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Subsequent Events	9 Months Ended
Subsequent Events	Feb. 28, 2014
Subsequent Events	NOTE Q – Subsequent Events On March 27, 2014, we acquired the tank manufacturing division of Steffes Corporation (“Steffes”) for cash consideration of $28,872,000. Steffes manufactures oilfield storage tanks for customers drilling in the Bakken shale and Williston Basin region out of a manufacturing facility located in Dickinson, North Dakota.