Consolidated Condensed Statements Of Equity (USD $) In Thousands	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interest [Member]	Total
Balance at Jan. 31, 2010	$ 299	$ (186,407)	$ 141,698	$ 290,984	$ 49	$ 28,473	$ 275,096
Balance (in Shares) at Jan. 31, 2010	29,853	20,045
Net income				9,672		2,128	11,800
Treasury stock acquired		(6,666)					(6,666)
Treasury stock acquired (in Shares)		415
Reclassification adjustment for net gains included in net income, net of tax					(49)		(49)
Stock options and related tax effects		866	572				1,438
Stock options and related tax effects (in Shares)		(93)
Balance at Oct. 31, 2010	299	(192,207)	142,270	300,656		30,601	281,619
Balance (in Shares) at Oct. 31, 2010	29,853	20,367
Balance at Jan. 31, 2011	299	(193,713)	142,293	296,053		25,032	269,964
Balance (in Shares) at Jan. 31, 2011	29,853	20,461
Net income				13,481		2,435	15,916
Noncontrolling interests distribution						(1,796)	(1,796)
Other						(192)	(192)
Treasury stock acquired		(24,410)					(24,410)
Treasury stock acquired (in Shares)		1,451
Stock options and related tax effects		4,066	86				4,152
Stock options and related tax effects (in Shares)		(436)
Balance at Oct. 31, 2011	$ 299	$ (214,057)	$ 142,379	$ 309,534		$ 25,479	$ 263,634
Balance (in Shares) at Oct. 31, 2011	29,853	21,476