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, 2014	$ 299,000	$ (222,170,000)	$ 144,051,000	$ 357,101,000	$ 31,472,000	$ 310,753,000
Balance (in Shares) at Jan. 31, 2014	29,853,000	21,753,000
Net income				87,337,000	16,377,000	103,714,000
Treasury stock acquired		$ (18,238,000)				$ (18,238,000)
Treasury stock acquired (in Shares)		284,000				283,979
Noncontrolling interests distribution and other					(4,856,000)	$ (4,856,000)
Stock options and related tax effects		$ 851,000	740,000			1,591,000
Stock options and related tax effects (in Shares)		(83,000)
Balance at Jan. 31, 2015	$ 299,000	$ (239,557,000)	144,791,000	444,438,000	42,993,000	392,964,000
Balance (in Shares) at Jan. 31, 2015	29,853,000	21,954,000
Net income				31,436,000	5,974,000	37,410,000
Treasury stock acquired		$ (70,208,000)				$ (70,208,000)
Treasury stock acquired (in Shares)		1,254,000				1,254,344
Noncontrolling interests distribution and other					(4,471,000)	$ (4,471,000)
Stock options and related tax effects		$ 11,000	53,000			64,000
Stock options and related tax effects (in Shares)		(4,000)
Balance at Jan. 31, 2016	$ 299,000	$ (309,754,000)	144,844,000	475,874,000	44,496,000	355,759,000
Balance (in Shares) at Jan. 31, 2016	29,853,000	23,204,000
Net income				32,333,000	7,185,000	39,518,000
Treasury stock acquired		$ (4,353,000)				$ (4,353,000)
Treasury stock acquired (in Shares)		88,000				87,904
Noncontrolling interests distribution and other					(3,842,000)	$ (3,842,000)
Stock options and related tax effects		$ 269,000	923,000			1,192,000
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