Components of Accumulated Other Comprehensive Loss (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	Feb. 28, 2013	Feb. 29, 2012
Accumulated Defined Benefit Plans Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Loss, Tax	$ 1,974	$ 2,208
Accumulated Other Post Retirement Liabilities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Loss, Tax	$ 1,027	$ 935