Stock Compensation - Schedule By Exercise Price Range (Details) - Stock Appreciation Rights (SARs) [Member] - $ / shares	12 Months Ended
	Feb. 28, 2019	Feb. 28, 2018	Feb. 28, 2017	Feb. 29, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total Options/ SAR’s (shares)		148,513	170,139	312,748
Weighted Average Exercise Price, Outstanding (usd per share)	$ 44.46	$ 43.29	$ 42.02	$ 34.23
Options / SAR’s Currently Exercisable (shares)	98,184	148,513	126,975
Weighted Average Exercise Price, Exercisable (usd per share)	$ 44.46	$ 43.29	$ 41.27
$39.65 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices (usd per share)	$ 39.65
Total Options/ SAR’s (shares)	950
Average Remaining Life	1 year 6 months 8 days
Weighted Average Exercise Price, Outstanding (usd per share)	$ 39.65
Options / SAR’s Currently Exercisable (shares)	950
Weighted Average Exercise Price, Exercisable (usd per share)	$ 39.65
$43.92 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices (usd per share)	$ 43.92
Total Options/ SAR’s (shares)	54,510
Average Remaining Life	2 years 5 days
Weighted Average Exercise Price, Outstanding (usd per share)	$ 43.92
Options / SAR’s Currently Exercisable (shares)	54,510
Weighted Average Exercise Price, Exercisable (usd per share)	$ 43.92
$45.26 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices (usd per share)	$ 45.26
Total Options/ SAR’s (shares)	40,000
Average Remaining Life	1 year 8 months 5 days
Weighted Average Exercise Price, Outstanding (usd per share)	$ 45.26
Options / SAR’s Currently Exercisable (shares)	40,000
Weighted Average Exercise Price, Exercisable (usd per share)	$ 45.26
$45.36 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices (usd per share)	$ 45.36
Total Options/ SAR’s (shares)	2,724
Average Remaining Life	1 year
Weighted Average Exercise Price, Outstanding (usd per share)	$ 45.36
Options / SAR’s Currently Exercisable (shares)	2,724
Weighted Average Exercise Price, Exercisable (usd per share)	$ 45.36
$39.65 - $45.36 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total Options/ SAR’s (shares)	98,184
Average Remaining Life	1 year 10 months 3 days
Weighted Average Exercise Price, Outstanding (usd per share)	$ 44.46
Options / SAR’s Currently Exercisable (shares)	98,184
Weighted Average Exercise Price, Exercisable (usd per share)	$ 44.46