CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($)	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Noncontrolling Interest [Member]	Total
Balance at Jan. 31, 2017	$ 299,000	$ (313,838,000)	$ 145,767,000	$ 508,207,000	$ 47,839,000	$ 388,274,000
Balance (in Shares) at Jan. 31, 2017	29,853,000	23,292,000
Net income				39,706,000	5,206,000	44,912,000
Capital contributions					918,000	918,000
Noncontrolling interests distribution and other					(3,529,000)	(3,529,000)
Stock options and related tax effects		$ 195,000	1,156,000			1,351,000
Stock options and related tax effects (in Shares)		(5,000)
Balance at Jan. 31, 2018	$ 299,000	$ (313,643,000)	146,923,000	547,913,000	50,434,000	431,926,000
Balance (in Shares) at Jan. 31, 2018	29,853,000	23,287,000
Net income				31,645,000	5,865,000	37,510,000
Capital contributions					524,000	524,000
Treasury stock acquired		$ (21,855,000)				$ (21,855,000)
Treasury stock acquired (in Shares)		305,000				305,473
Noncontrolling interests distribution and other					(4,489,000)	$ (4,489,000)
Stock options and related tax effects		$ 305,000	1,350,000			1,655,000
Stock options and related tax effects (in Shares)		(12,000)
Balance at Jan. 31, 2019	$ 299,000	$ (335,193,000)	148,273,000	579,558,000	52,334,000	445,271,000
Balance (in Shares) at Jan. 31, 2019	29,853,000	23,580,000
Net income				7,427,000	4,217,000	11,644,000
Capital contributions					312,000	$ 312,000
Treasury stock acquired (in Shares)						349,861
Noncontrolling interests distribution and other					(4,264,000)	$ (4,264,000)
Stock options and related tax effects		$ 127,000	516,000			643,000
Stock options and related tax effects (in Shares)		(19,000)
Balance at Jan. 31, 2020	$ 299,000	$ (335,066,000)	$ 148,789,000	$ 586,985,000	$ 52,599,000	$ 453,606,000
Balance (in Shares) at Jan. 31, 2020	29,853,000	23,561,000