CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Noncontrolling Interest [Member]	Total
Balance at Jan. 31, 2016	$ 299	$ (309,754)	$ 144,844	$ 475,874	$ 44,496	$ 355,759
Balance (in Shares) at Jan. 31, 2016	29,853,000	23,204,000
Net income				32,333	7,185	39,518
Treasury stock acquired		$ (4,353)				$ (4,353)
Treasury stock acquired (in Shares)		88,000				87,904
Noncontrolling interests distribution and other					(3,842)	$ (3,842)
Stock options and related tax effects		$ 269	923			1,192
Balance at Jan. 31, 2017	$ 299	$ (313,838)	145,767	508,207	47,839	388,274
Balance (in Shares) at Jan. 31, 2017	29,853,000	23,292,000
Net income				39,706	5,206	44,912
Capital contributions					918	918
Noncontrolling interests distribution and other					(3,529)	(3,529)
Stock options and related tax effects		$ 195	1,156			1,351
Stock options and related tax effects (in Shares)		(5,000)
Balance at Jan. 31, 2018	$ 299	$ (313,643)	146,923	547,913	50,434	431,926
Balance (in Shares) at Jan. 31, 2018	29,853,000	23,287,000
Net income				31,645	5,865	37,510
Capital contributions					524	524
Treasury stock acquired		$ (21,855)				$ (21,855)
Treasury stock acquired (in Shares)		305,000				305,473
Noncontrolling interests distribution and other					(4,489)	$ (4,489)
Stock options and related tax effects		$ 305	1,350			1,655
Stock options and related tax effects (in Shares)		(12,000)
Balance at Jan. 31, 2019	$ 299	$ (335,193)	$ 148,273	$ 579,558	$ 52,334	$ 445,271
Balance (in Shares) at Jan. 31, 2019	29,853,000	23,580,000