Benefit Plans (Benefit Plan Information) (Details) - USD ($) $ in Thousands	Feb. 29, 2020	Feb. 28, 2019
Defined Benefit Plan Disclosure [Line Items]
Plan assets	$ 168,835	$ 166,020
Projected benefit obligation	310,939	242,759
Funded status recognized	(142,104)	(76,739)
Current liability	(615)	(500)
Noncurrent liability	(141,489)	(76,239)
Net amount recognized	(142,104)	(76,739)
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Plan assets	168,835	166,020
Projected benefit obligation	298,441	231,677
Funded status recognized	(129,606)	(65,657)
Current liability	0	0
Noncurrent liability	(129,606)	(65,657)
Net amount recognized	(129,606)	(65,657)
Restoration Plan
Defined Benefit Plan Disclosure [Line Items]
Plan assets	0	0
Projected benefit obligation	12,498	11,082
Funded status recognized	(12,498)	(11,082)
Current liability	(615)	(500)
Noncurrent liability	(11,883)	(10,582)
Net amount recognized	$ (12,498)	$ (11,082)