Costs and Estimated Earnings On Uncompleted Contracts - Accumulated Costs Net Of Billings (Details) (USD $) In Thousands, unless otherwise specified	Feb. 28, 2014	Feb. 28, 2013
Contractors [Abstract]
Costs incurred on uncompleted contracts	$ 158,224	$ 56,499
Estimated earnings	65,063	27,275
Total costs and estimated earnings	223,287	83,774
Less billings to date	199,083	72,666
Total costs net of billings	$ 24,204	$ 11,108