CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Noncontrolling Interest [Member]	Total
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	23,287
Balance at Apr. 30, 2018	$ 299	$ (322,758)	146,981	557,409	51,400	433,331
Balance (in Shares) at Apr. 30, 2018	29,853	23,413
Net income				9,496	856	10,352
Treasury stock acquired		$ (9,128)				(9,128)
Treasury stock acquired (in Shares)		126
Capital contributions					110	110
Stock based compensation expense		$ 13	58			71
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	23,287
Balance at Jul. 31, 2018	$ 299	$ (329,999)	148,212	566,626	51,110	436,248
Balance (in Shares) at Jul. 31, 2018	29,853	23,502
Net income						20,842
Capital contributions						246
Balance at Apr. 30, 2018	$ 299	$ (322,758)	146,981	557,409	51,400	433,331
Balance (in Shares) at Apr. 30, 2018	29,853	23,413
Balance at Jul. 31, 2018	$ 299	$ (329,999)	148,212	566,626	51,110	436,248
Balance (in Shares) at Jul. 31, 2018	29,853	23,502
Net income				9,217	1,273	10,490
Treasury stock acquired		$ (7,520)				(7,520)
Treasury stock acquired (in Shares)		102
Noncontrolling interests distribution and other					(1,699)	(1,699)
Capital contributions					136	136
Stock based compensation expense		$ 279	1,231			1,510
Stock based compensation expense (in Shares)		(13)
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	23,580
Balance at Apr. 30, 2019	$ 299	$ (335,186)	148,303	582,379	53,287	449,082
Balance (in Shares) at Apr. 30, 2019	29,853	23,580
Net income				2,821	894	3,715
Noncontrolling interests distribution and other					(87)	(87)
Capital contributions					146	146
Stock based compensation expense		$ 7	30			37
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	23,580
Balance at Jul. 31, 2019	$ 299	$ (335,080)	148,724	584,635	51,912	450,490
Balance (in Shares) at Jul. 31, 2019	29,853	23,561
Net income						7,068
Capital contributions						185
Balance at Apr. 30, 2019	$ 299	$ (335,186)	148,303	582,379	53,287	449,082
Balance (in Shares) at Apr. 30, 2019	29,853	23,580
Balance at Jul. 31, 2019	$ 299	$ (335,080)	148,724	584,635	51,912	450,490
Balance (in Shares) at Jul. 31, 2019	29,853	23,561
Net income				$ 2,256	1,097	3,353
Noncontrolling interests distribution and other					(2,511)	(2,511)
Capital contributions					$ 39	39
Stock based compensation expense		$ 106	$ 421			$ 527
Stock based compensation expense (in Shares)		(19)