Earnings (loss) per Share - Computation for Basic and Diluted Earnings (loss) per Share (Detail) - $ / shares	3 Months Ended	9 Months Ended
Nov. 30, 2017	Nov. 30, 2016	Nov. 30, 2017	Nov. 30, 2016
Earnings Per Share [Abstract]
Basic weighted average common shares outstanding	25,360,452	25,673,824	25,387,389	25,802,658
Effect of dilutive options	33,030	9,789	21,870	15,488
Diluted weighted average common shares outstanding	25,393,482	25,683,613	25,409,259	25,818,146
Earnings (loss) per share - basic and diluted
Earnings per share on continuing operations	$ 0.33	$ 0.22	$ 0.97	$ 0.74
Earnings per share on discontinued operations				0.10
Loss per share on sale of discontinued operations				(1.01)
Loss on discontinued operations				(0.91)
Net earnings (loss)	0.33	0.22	0.97	(0.17)
Cash dividends	$ 0.200	$ 0.175	$ 0.575	$ 2.025

Aggregate dividends paid during the period for each share of common stock outstanding.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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Per basic and diluted share amount, after tax, of the gain (loss) on the disposal of discontinued operations, when the per share amount is the same.

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The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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The amount of net income (loss) from continuing operations per each basic and diluted share of common stock or unit when the per share amount is the same for both basic and diluted shares.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of call options and warrants using the treasury stock method.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 23
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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Section 50
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-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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