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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
 12 Months Ended
Jan. 31, 2014
Jan. 31, 2013
Jan. 31, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:      
Net income (loss) $ 40,229,000 $ (1,588,000) $ 33,698,000
Depreciation and amortization 17,284,000 16,602,000 12,086,000
Impairment charges on real estate 55,000 562,000 1,227,000
Income from equity method investments (17,175,000) (627,000) (21,532,000)
Dividends received from equity method investments 5,804,000 2,206,000 4,918,000
Bargain purchase gain, net (8,990,000)   (3,541,000)
Income from synthetic fuel investments     (2,883,000)
Derivative financial instruments (1,648,000) (1,446,000) (1,288,000)
(Gain) loss on disposal of real estate and property and equipment (1,015,000) 357,000 (683,000)
Deferred income tax 15,987,000 (504,000) 14,667,000
Excess tax benefit from stock option exercises (64,000)    
Changes in assets and liabilities, net of acquisition:      
Accounts receivable (4,919,000) 1,217,000 4,216,000
Inventory 5,549,000 5,430,000 (14,039,000)
Prepaid expenses and other assets (1,490,000) 498,000 1,059,000
Income taxes refundable 1,480,000 719,000 7,852,000
Accounts payable-trade 1,721,000 (1,448,000) 1,191,000
Accrued expenses and other liabilities 2,637,000 (4,930,000) (2,052,000)
Net cash provided by operating activities 64,435,000 17,048,000 34,896,000
CASH FLOWS FROM INVESTING ACTIVITIES:      
Capital expenditures (3,518,000) (3,684,000) (7,342,000)
Proceeds from synthetic fuel investments     2,883,000
Purchase of investments     (1,947,000)
Acquisition of business, net of cash acquired     12,293,000
Repayment of note receivable 681,000    
Proceeds from sale of real estate and property and equipment 8,876,000 2,849,000 4,445,000
Restricted cash (500,000)    
Restricted investments and deposits 1,293,000 860,000 237,000
Net cash provided by investing activities 6,832,000 25,000 10,569,000
CASH FLOWS FROM FINANCING ACTIVITIES:      
Payments of long term debt (31,203,000) (16,820,000) (35,653,000)
Stock options exercised 1,072,000 265,000 362,000
Payments for loan fees     (627,000)
Payments to noncontrolling interests holders (1,638,000) (2,085,000) (2,084,000)
Excess tax benefit from stock option exercises 64,000    
Repayments of contingent consideration liability     (1,251,000)
Treasury stock acquired (3,486,000) (4,373,000) (22,218,000)
Net cash used in financing activities (35,191,000) (23,013,000) (61,471,000)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS 36,076,000 (5,940,000) (16,006,000)
CASH AND CASH EQUIVALENTS-Beginning of year 69,073,000 75,013,000 91,019,000
CASH AND CASH EQUIVALENTS-End of year 105,149,000 69,073,000 75,013,000
Non cash financing activities-Cashless exercises of stock options   1,071,000 3,444,000
Non cash investing activities-Accrued capital expenditures 250,000   882,000
Non cash financing activities-Accrued noncontrolling interest holders payments   $ 23,000