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Benefit Plans (Components Of Net Pension Expense) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Aug. 31, 2014
Aug. 31, 2013
Aug. 31, 2014
Aug. 31, 2013
Defined Benefit Plan Disclosure [Line Items]        
Interest cost $ 2,121 $ 1,993 $ 4,242 $ 3,988
Expected return on plan assets (2,247) (1,978) (4,514) (3,958)
Recognized actuarial loss 340 429 680 837
Net pension expense 214 444 408 867
Pension Plan [Member]
        
Defined Benefit Plan Disclosure [Line Items]        
Interest cost 2,008 1,895 4,016 3,791
Expected return on plan assets (2,247) (1,978) (4,514) (3,958)
Recognized actuarial loss 340 429 680 837
Net pension expense 101 346 182 670
Restoration Plan [Member]
        
Defined Benefit Plan Disclosure [Line Items]        
Interest cost 113 98 226 197
Expected return on plan assets 0 0 0 0
Recognized actuarial loss 0 0 0 0
Net pension expense $ 113 $ 98 $ 226 $ 197