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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Jan. 31, 2012
Jan. 31, 2011
Jan. 31, 2010
CASH FLOWS FROM OPERATING ACTIVITIES:      
Net income $ 33,698 $ 8,742 $ 12,552
Adjustments to reconcile net income to net cash provided by operating activities:      
Depreciation and amortization 12,086 17,943 10,603
Impairment charges and loss on deconsolidation, net of cash divested of $2,304   16,120  
Stock based compensation expense     234
Impairment charges on real estate 1,227 1,021 1,533
Income from equity method investments (21,532) (14,558) (6,027)
Dividends received from equity method investments 4,918 4,965 702
Bargain purchase gain, net (3,541)    
Income from synthetic fuel investments (2,883)    
Derivative financial instruments (1,288) (361) (144)
Gain on disposal of real estate and property and equipment (683) (293) (2,003)
Deferred income (3,982) (7,816) (16,559)
Deferred income tax 14,667 3,803 12,958
Changes in assets and liabilities, net of acquisition and deconsolidation:      
Accounts receivable 4,216 (2,472) (4,926)
Inventory (14,039) (554) 15,676
Prepaid expenses and other assets 1,059 (2,022) 1,906
Income taxes refundable 7,852 4,310 (4,924)
Accounts payable-trade 1,191 761 (8,457)
Other liabilities 1,930 (1,668) (2,146)
Net cash provided by operating activities 34,896 27,921 10,978
CASH FLOWS FROM INVESTING ACTIVITIES:      
Capital expenditures (7,342) (6,033) (35,652)
Proceeds from synthetic fuel investments 2,883    
Purchase of investments (1,947) (9,214) (25)
Acquisition of business, net of cash acquired 12,293    
Proceeds of note receivable   965  
Proceeds from sale of real estate and property and equipment 4,445 7,986 4,756
Restricted investments 237 500 184
Net cash provided by (used in) investing activities 10,569 (5,796) (30,737)
CASH FLOWS FROM FINANCING ACTIVITIES:      
Proceeds from long term debt     48,958
Payments of long term debt (35,653) (24,793) (20,376)
Stock options exercised 362 1,518 6,038
Payments for loan fees (627)    
Payments to noncontrolling interests holders (2,084)    
Repayments of contingent consideration liability (1,251)    
Treasury stock acquired (22,218) (8,229) (6,454)
Net cash (used in) provided by financing activities (61,471) (31,504) 28,166
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS (16,006) (9,379) 8,407
CASH AND CASH EQUIVALENTS-Beginning of year 91,019 100,398 91,991
CASH AND CASH EQUIVALENTS-End of year 75,013 91,019 100,398
Non cash activities-Cashless exercises of stock options 3,444   9,239
Non cash activities-Accrued capital expenditures 882 102 265
Non cash activities-Payable related to plant construction refinanced to long term debt     $ 9,749