Shareholders' Equity - Changes in Shareholders' Equity (Detail) - USD ($) $ in Thousands	3 Months Ended
	May. 31, 2015	May. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning Balance, Amount	$ 284,680
Beginning Balance, Shares	30,053,443
Net earnings	$ 9,171	$ 8,032
Foreign currency translation, net of deferred tax of $407	(664)	$ 980
Dividends paid ($.175 per share)	(4,496)
Stock based compensation	332
Exercise of stock options and restricted stock grants	0
Ending Balance, Amount	$ 289,023
Ending Balance, Shares	30,053,443
Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning Balance, Amount	$ 75,134
Beginning Balance, Shares	30,053,443
Net earnings	$ 0
Foreign currency translation, net of deferred tax of $407	0
Dividends paid ($.175 per share)	0
Stock based compensation	0
Exercise of stock options and restricted stock grants	0
Ending Balance, Amount	$ 75,134
Ending Balance, Shares	30,053,443
Additional Paid-in Capital [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning Balance, Amount	$ 121,687
Net earnings	0
Foreign currency translation, net of deferred tax of $407	0
Dividends paid ($.175 per share)	0
Stock based compensation	332
Exercise of stock options and restricted stock grants	(1,352)
Ending Balance, Amount	120,667
Retained Earnings [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning Balance, Amount	188,413
Net earnings	9,171
Foreign currency translation, net of deferred tax of $407	0
Dividends paid ($.175 per share)	(4,496)
Stock based compensation	0
Exercise of stock options and restricted stock grants	0
Ending Balance, Amount	193,088
Accumulated Other Comprehensive Income (Loss) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning Balance, Amount	(22,197)
Net earnings	0
Foreign currency translation, net of deferred tax of $407	(664)
Dividends paid ($.175 per share)	0
Stock based compensation	0
Exercise of stock options and restricted stock grants	0
Ending Balance, Amount	(22,861)
Treasury Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning Balance, Amount	$ (78,357)
Beginning Balance, Treasury Stock, Shares	(4,514,905)
Net earnings	$ 0
Foreign currency translation, net of deferred tax of $407	0
Dividends paid ($.175 per share)	0
Stock based compensation	0
Exercise of stock options and restricted stock grants	$ 1,352
Exercise of stock options and restricted stock grants, shares	77,900
Ending Balance, Amount	$ (77,005)
Ending Balance, Treasury Stock, Shares	(4,437,005)