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Retirement Plans (Narrative) (Details) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Nov. 30, 2016
Nov. 30, 2015
Nov. 30, 2016
Nov. 30, 2015
Feb. 29, 2016
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]          
Defined Benefit Plan, Amortization of Gains (Losses) $ (400,000) $ (500,000) $ (1,200,000) $ (1,500,000)  
Contributions to pension plan     0    
Anticipated contribution during remainder of fiscal year     $ 0    
Expected rate of return on plan assets         7.75%