Retirement Plans (Components Of Net Pension Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Nov. 30, 2016	Nov. 30, 2015	Nov. 30, 2016	Nov. 30, 2015
Defined Benefit Plan Disclosure [Line Items]
Net pension expense	$ 202	$ 326	$ 608	$ 978
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Net pension expense	82	212	248	636
Restoration Plan
Defined Benefit Plan Disclosure [Line Items]
Net pension expense	$ 120	$ 114	$ 360	$ 342