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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, 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        
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