Benefit Plans (Components Of Net Pension Expense) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Nov. 30, 2013	Nov. 30, 2012	Nov. 30, 2013	Nov. 30, 2012
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 2,024	$ 1,940	$ 6,012	$ 5,820
Expected return on plan assets	(1,979)	(1,898)	(5,937)	(5,694)
Recognized actuarial loss	418	300	1,255	900
Net pension expense	463	342	1,330	1,026
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	1,896	1,825	5,687	5,475
Expected return on plan assets	(1,979)	(1,898)	(5,937)	(5,694)
Recognized actuarial loss	418	300	1,255	900
Net pension expense	335	227	1,005	681
Restoration Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	128	115	325	345
Expected return on plan assets	0	0	0	0
Recognized actuarial loss	0	0	0	0
Net pension expense	$ 128	$ 115	$ 325	$ 345