Shareholders' Equity - Changes in Shareholders' Equity (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended				3 Months Ended
	May 31, 2014	May 31, 2013	May 31, 2014 Common Stock [Member]	Feb. 28, 2014 Common Stock [Member]	May 31, 2014 Additional Paid-in Capital [Member]	May 31, 2014 Retained Earnings [Member]	May 31, 2014 Accumulated Other Comprehensive Income (Loss) [Member]	May 31, 2014 Treasury Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning Balance, Amount	$ 362,935		$ 75,134	$ 75,134	$ 122,517	$ 251,137	$ (12,413)	$ (73,440)
Beginning Balance, Shares	30,053,443		30,053,443	30,053,443
Beginning Balance, Treasury Stock, Shares								(4,131,276)
Net earnings	8,032	8,506				8,032
Foreign currency translation, net of deferred tax of $600	980	150					980
Dividends declared ($.175 per share)	(4,567)					(4,567)
Stock based compensation	359				359
Exercise of stock options and restricted stock grants	54				(2,063)			2,117
Exercise of stock options and restricted stock grants, shares								119,061
Stock repurchases	(869)							(869)
Stock repurchases, shares								(58,051)
Ending Balance, Amount	$ 366,924		$ 75,134	$ 75,134	$ 120,813	$ 254,602	$ (11,433)	$ (72,192)
Ending Balance, Shares	30,053,443		30,053,443	30,053,443
Ending Balance, Treasury Stock, Shares								(4,070,266)