Share-Based Compensation Plans Share Based Compensation Expense in SG&A (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended
Aug. 31, 2019	Aug. 31, 2018	Aug. 31, 2019	Aug. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense, net of income tax benefits	$ 5,867	$ 4,348	$ 12,894	$ 10,402
Share Based Compensation Effect on Earnings Per Share [Abstract]
Basic (in dollars per share)	$ 0.23	$ 0.16	$ 0.51	$ 0.39
Diluted (in dollars per share)	$ 0.23	$ 0.16	$ 0.51	$ 0.39
SG&A
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense	$ 6,381	$ 4,689	$ 13,985	$ 11,013
Less income tax benefits	(514)	(341)	(1,091)	(611)
Stock options \| SG&A
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense	35	219	151	527
Performance based and other stock awards \| SG&A
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense	6,205	4,347	13,228	9,918
Employee stock purchase plan \| SG&A
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense	0	0	325	322
Directors stock compensation \| SG&A
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Share-based compensation expense	$ 141	$ 123	$ 281	$ 246

no definition available.

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Represents the effect of share-based compensation expenses on the basic earnings per share during the reporting period.

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Represents the effect of share-based compensation expenses on the diluted earnings per share during the reporting period.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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The amount of expense, net of income tax, recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

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