Consolidated Condensed Statements Of Equity (USD $) In Thousands, except Share data	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Noncontrolling Interest [Member]	Total
Balance at Jan. 31, 2012	$ 299	$ (215,105)	$ 142,994	$ 324,323	$ 29,332	$ 281,843
Balance (in Shares) at Jan. 31, 2012	29,853,000	21,523,000
Net income				933	559	1,492
Treasury stock acquired		(1,071)				(1,071)
Treasury stock acquired (in Shares)		33,000				32,935
Noncontrolling interests distribution and other					(526)	(526)
Stock options and related tax effects		937	598			1,535
Stock options and related tax effects (in Shares)		(94,000)
Balance at Apr. 30, 2012	299	(215,239)	143,592	325,256	29,365	283,273
Balance (in Shares) at Apr. 30, 2012	29,853,000	21,462,000
Balance at Jan. 31, 2013	299	(219,550)	143,575	322,028	27,931	274,283
Balance (in Shares) at Jan. 31, 2013	29,853,000	21,701,000
Net income				3,507	566	4,073
Treasury stock acquired		(564)				(564)
Treasury stock acquired (in Shares)		31,000
Stock options and related tax effects		438	130			568
Stock options and related tax effects (in Shares)		(43,000)
Balance at Apr. 30, 2013	$ 299	$ (219,676)	$ 143,705	$ 325,535	$ 28,497	$ 278,360
Balance (in Shares) at Apr. 30, 2013	29,853,000	21,689,000