Accumulated Other Comprehensive Loss (Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Nov. 30, 2017	Nov. 30, 2016	Nov. 30, 2017	Nov. 30, 2016
Schedule of Accumulated Other Comprehensive Loss [Line Items]
Beginning balance			$ (56,555)
Other comprehensive income before reclassifications			2,683
Amounts reclassified from accumulated other comprehensive loss			2,568
Other comprehensive income, net of taxes	$ 8,323	$ 6,447	5,251	$ 10,061
Ending balance	(51,304)		(51,304)
Net Unrecognized Actuarial Losses
Schedule of Accumulated Other Comprehensive Loss [Line Items]
Beginning balance			(55,521)
Other comprehensive income before reclassifications			0
Amounts reclassified from accumulated other comprehensive loss			826
Other comprehensive income, net of taxes			826
Ending balance	(54,695)		(54,695)
Net Unrecognized Hedge Losses
Schedule of Accumulated Other Comprehensive Loss [Line Items]
Beginning balance			(1,034)
Other comprehensive income before reclassifications			2,683
Amounts reclassified from accumulated other comprehensive loss			1,742
Other comprehensive income, net of taxes			4,425
Ending balance	$ 3,391		$ 3,391