Pension Plan (Details 1)	12 Months Ended
	Feb. 28, 2013
Cash [Member]
Company's target asset allocation percentage, by asset class
Target Allocation Percentage Minimum	2.00%
Target Allocation Percentage Maximum	5.00%
Fixed Income [Member]
Company's target asset allocation percentage, by asset class
Target Allocation Percentage Minimum	43.00%
Target Allocation Percentage Maximum	53.00%
Equity Securities [Member]
Company's target asset allocation percentage, by asset class
Target Allocation Percentage Minimum	45.00%
Target Allocation Percentage Maximum	55.00%