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Schedule I - CONDENSED FINANCIAL INFORMATION OF PARENT COMPANY (Detail) - CONDENSED STATEMENTS OF CASH FLOWS PARENT COMPANY ONLY (USD $)
 12 Months Ended
Jan. 31, 2013
Jan. 31, 2012
Jan. 31, 2011
CASH FLOWS FROM OPERATING ACTIVITIES:      
Net (loss) income $ (1,588,000) $ 33,698,000 $ 8,742,000
Depreciation and amortization 16,602,000 12,086,000 17,943,000
Impairment charges and loss on deconsolidation, net of cash divested of $2,304     16,120,000
Impairment charges on real estate 562,000 1,227,000 1,021,000
Loss (income) from equity method investments (627,000) (21,532,000) (14,558,000)
Dividends received from equity method investments 2,206,000 4,918,000 4,965,000
Bargain purchase gain, net (8,990,000) (3,541,000)  
Income from synthetic fuel investments   (2,883,000)  
Loss (gain) on disposal of real estate and property and equipment 357,000 (683,000) (293,000)
Deferred income (1,789,000) (3,982,000) (7,816,000)
Deferred income tax (504,000) 14,667,000 3,803,000
Changes in assets and liabilities, net of acquisition and deconsolidation:      
Accounts receivable (1,217,000) (4,216,000) 2,472,000
Prepaid expenses and other assets (498,000) (1,059,000) 2,022,000
Income taxes refundable 719,000 7,852,000 4,310,000
Accounts payable-trade (1,448,000) 1,191,000 761,000
Other liabilities 3,141,000 (1,930,000) 1,668,000
Net cash provided by (used in) operating activities 17,048,000 34,896,000 27,921,000
CASH FLOWS FROM INVESTING ACTIVITIES:      
Capital expenditures (3,684,000) (7,342,000) (6,033,000)
Proceeds from synthetic fuel investments   2,883,000  
Purchase of investments   (1,947,000) (9,214,000)
Proceeds of note receivable     965,000
Proceeds from sale of real estate and property and equipment 2,849,000 4,445,000 7,986,000
Restricted investments 860,000 237,000 500,000
Net cash provided by (used in) investing activities 25,000 10,569,000 (5,796,000)
CASH FLOWS FROM FINANCING ACTIVITIES:      
Payments of long term debt (16,820,000) (35,653,000) (24,793,000)
Stock options exercised 265,000 362,000 1,518,000
Repayments of contingent consideration liability   (1,251,000)  
Treasury stock acquired (4,373,000) (22,218,000) (8,229,000)
Net cash used in financing activities (23,013,000) (61,471,000) (31,504,000)
NET DECREASE IN CASH AND CASH EQUIVALENTS (5,940,000) (16,006,000) (9,379,000)
CASH AND CASH EQUIVALENTS-Beginning of year 75,013,000 91,019,000 100,398,000
CASH AND CASH EQUIVALENTS-End of year 69,073,000 75,013,000 91,019,000
Non cash activities-Cashless exercises of stock options 1,071,000 3,444,000  
Parent Company [Member]
      
CASH FLOWS FROM OPERATING ACTIVITIES:      
Net (loss) income (2,295,000) 28,270,000 5,069,000
Depreciation and amortization 937,000 967,000 2,358,000
Impairment charges and loss on deconsolidation, net of cash divested of $2,304     15,023,000
Impairment charges on real estate 562,000 1,227,000 1,021,000
Loss (income) from equity method investments 1,451,000 (43,100,000) (29,691,000)
Dividends received from equity method investments 6,267,000 9,995,000 4,965,000
Bargain purchase gain, net   (3,541,000)  
Income from synthetic fuel investments   (2,883,000)  
Loss (gain) on disposal of real estate and property and equipment (133,000) (683,000) (293,000)
Deferred income (1,864,000) (3,982,000) (7,816,000)
Deferred income tax (908,000) 14,587,000 3,702,000
Changes in assets and liabilities, net of acquisition and deconsolidation:      
Accounts receivable (77,000) 1,000 343,000
Prepaid expenses and other assets 773,000 1,295,000 1,808,000
Income taxes refundable 719,000 7,852,000 4,310,000
Accounts payable-trade (108,000) 67,000 (1,307,000)
Other liabilities (2,762,000) 1,866,000 (1,783,000)
Net cash provided by (used in) operating activities 2,562,000 11,938,000 (2,291,000)
CASH FLOWS FROM INVESTING ACTIVITIES:      
Capital expenditures   (66,000) (356,000)
Proceeds from synthetic fuel investments   2,883,000  
Purchase of investments   (21,625,000) (9,214,000)
Proceeds of note receivable     965,000
Proceeds from sale of real estate and property and equipment 2,815,000 4,345,000 7,986,000
Restricted investments 860,000 237,000 500,000
Net cash provided by (used in) investing activities 3,675,000 (14,226,000) (119,000)
CASH FLOWS FROM FINANCING ACTIVITIES:      
Payments of long term debt (451,000) (1,195,000) (701,000)
Stock options exercised 265,000 362,000 1,518,000
Repayments of contingent consideration liability   (1,251,000)  
Treasury stock acquired (4,373,000) (22,218,000) (8,229,000)
Net cash used in financing activities (4,559,000) (24,302,000) (7,412,000)
NET DECREASE IN CASH AND CASH EQUIVALENTS 1,678,000 (26,590,000) (9,822,000)
CASH AND CASH EQUIVALENTS-Beginning of year 46,066,000 72,656,000 82,478,000
CASH AND CASH EQUIVALENTS-End of year 47,744,000 46,066,000 72,656,000
Non cash activities-Cashless exercises of stock options $ 1,071,000 $ 3,444,000