Retirement Plans (Components Of Net Pension Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Nov. 30, 2017	Nov. 30, 2016	Nov. 30, 2017	Nov. 30, 2016
Defined Benefit Plan Disclosure [Line Items]
Net pension expense	$ 168	$ 202	$ 506	$ 608
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Net pension expense	51	82	155	248
Restoration Plan
Defined Benefit Plan Disclosure [Line Items]
Net pension expense	$ 117	$ 120	$ 351	$ 360