Components of Net Periodic Benefit Cost for Defined Benefit Plans and Other Post Retirement Plan (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	May 31, 2013	May 31, 2012
Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Interest Cost	$ 136	$ 146
Expected Return on Plan Assets	(163)	(143)
Amortization of Net Loss	150	164
Total Net Periodic Benefit Cost	123	167
Other Postretirement Benefit Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Service Cost	5	6
Interest Cost	19	19
Amortization of Unrecognized Prior Service Cost	(69)	(69)
Amortization of Net Loss	51	49
Total Net Periodic Benefit Cost	$ 6	$ 5