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QUARTERLY UNAUDITED INFORMATION (Details) - Schedule of Quarterly Financial Information (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Jan. 31, 2015 | Oct. 31, 2014 | Jul. 31, 2014 | Apr. 30, 2014 | Jan. 31, 2014 | Oct. 31, 2013 | Jul. 31, 2013 | Apr. 30, 2013 | Jan. 31, 2015 | Jan. 31, 2014 | Jan. 31, 2013
Schedule of Quarterly Financial Information [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales and revenue (a) | $ 127,651 us-gaap_SalesRevenueNet | [1] | $ 138,424 us-gaap_SalesRevenueNet | [1] | $ 150,231 us-gaap_SalesRevenueNet | [1] | $ 155,924 us-gaap_SalesRevenueNet | [1] | $ 146,073 us-gaap_SalesRevenueNet | [1] | $ 166,167 us-gaap_SalesRevenueNet | [1] | $ 175,385 us-gaap_SalesRevenueNet | [1] | $ 178,420 us-gaap_SalesRevenueNet | [1] | $ 572,230 us-gaap_SalesRevenueNet | $ 666,045 us-gaap_SalesRevenueNet | $ 656,589 us-gaap_SalesRevenueNet
Gross profit (a) | 29,974 us-gaap_GrossProfit | [1] | 36,491 us-gaap_GrossProfit | [1] | 38,838 us-gaap_GrossProfit | [1] | 36,636 us-gaap_GrossProfit | [1] | 26,344 us-gaap_GrossProfit | [1] | 18,025 us-gaap_GrossProfit | [1] | 10,897 us-gaap_GrossProfit | [1] | 9,022 us-gaap_GrossProfit | [1] | 141,939 us-gaap_GrossProfit | 64,288 us-gaap_GrossProfit | 13,802 us-gaap_GrossProfit
Net income | 24,207 us-gaap_ProfitLoss |  | 28,589 us-gaap_ProfitLoss |  | 26,718 us-gaap_ProfitLoss |  | 24,200 us-gaap_ProfitLoss |  | 17,933 us-gaap_ProfitLoss |  | 11,478 us-gaap_ProfitLoss |  | 6,745 us-gaap_ProfitLoss |  | 4,073 us-gaap_ProfitLoss |  | 103,714 us-gaap_ProfitLoss | 40,229 us-gaap_ProfitLoss | (1,588)us-gaap_ProfitLoss
Net income attributable to REX common shareholders | $ 20,348 us-gaap_NetIncomeLoss |  | $ 23,340 us-gaap_NetIncomeLoss |  | $ 21,907 us-gaap_NetIncomeLoss |  | $ 21,742 us-gaap_NetIncomeLoss |  | $ 15,874 us-gaap_NetIncomeLoss |  | $ 9,867 us-gaap_NetIncomeLoss |  | $ 5,825 us-gaap_NetIncomeLoss |  | $ 3,507 us-gaap_NetIncomeLoss |  | $ 87,337 us-gaap_NetIncomeLoss | $ 35,073 us-gaap_NetIncomeLoss | $ (2,295)us-gaap_NetIncomeLoss
Basic net income per share attributable to REX common shareholders (in Dollars per share) | $ 2.55 us-gaap_EarningsPerShareBasic |  | $ 2.86 us-gaap_EarningsPerShareBasic |  | $ 2.68 us-gaap_EarningsPerShareBasic |  | $ 2.68 us-gaap_EarningsPerShareBasic |  | $ 1.96 us-gaap_EarningsPerShareBasic |  | $ 1.21 us-gaap_EarningsPerShareBasic |  | $ 0.71 us-gaap_EarningsPerShareBasic |  | $ 0.43 us-gaap_EarningsPerShareBasic |  | $ 10.77 us-gaap_EarningsPerShareBasic | $ 4.31 us-gaap_EarningsPerShareBasic | $ (0.28)us-gaap_EarningsPerShareBasic
Diluted net income per share attributable to REX common shareholders (in Dollars per share) | $ 2.55 us-gaap_EarningsPerShareDiluted |  | $ 2.86 us-gaap_EarningsPerShareDiluted |  | $ 2.68 us-gaap_EarningsPerShareDiluted |  | $ 2.67 us-gaap_EarningsPerShareDiluted |  | $ 1.95 us-gaap_EarningsPerShareDiluted | [2] | $ 1.21 us-gaap_EarningsPerShareDiluted | [2] | $ 0.71 us-gaap_EarningsPerShareDiluted | [2] | $ 0.43 us-gaap_EarningsPerShareDiluted | [2] | $ 10.76 us-gaap_EarningsPerShareDiluted | $ 4.29 us-gaap_EarningsPerShareDiluted | $ (0.28)us-gaap_EarningsPerShareDiluted
[1] | Amounts differ from those previously reported as a result of retail operations and certain real estate assets sold being reclassified as discontinued operations and other reclassifications.
[2] | The total of the quarterly net income per share amounts do not equal the annual net loss or income per share amount due to the impact of varying amounts of shares and options outstanding during the year.

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