Consolidated Condensed Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Oct. 31, 2011	Oct. 31, 2010
Cash flows from operating activities:
Net income including noncontrolling interests	$ 15,916	$ 11,800
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	8,206	12,836
Impairment charges and other	1,164	687
Income from equity method investments	(15,827)	(7,625)
Income from synthetic fuel investments	(2,883)
Gain on disposal of real estate and property and equipment	(634)	(461)
Dividends received from equity method investees	2,316	1,057
Deferred income	(3,273)	(6,285)
Derivative financial instruments	(738)	699
Deferred income tax	8,177	5,512
Changes in assets and liabilities:
Accounts receivable	2,318	(3,119)
Inventory	(2,266)	(1,848)
Other assets	9,486	5,711
Accounts payable, trade	(1,475)	84
Other liabilities	2,031	(799)
Net cash provided by operating activities	22,518	18,249
Cash flows from investing activities:
Capital expenditures	(720)	(3,799)
Proceeds from sale of synthetic fuel investment	2,883
Purchase of equity method investment		(9,216)
Principal payments received on investment in debt instruments		1,014
Proceeds from sale of real estate and property and equipment	3,436	6,966
Proceeds from sale of restricted investments		500
Net cash provided by (used in) investing activities	5,599	(4,535)
Cash flows from financing activities:
Payments of long-term debt and capital lease obligations	(8,160)	(21,321)
Repayments of contingent consideration	(1,313)
Stock options exercised	317	1,438
Payments to noncontrolling interests holders	(1,796)
Other	(192)
Treasury stock acquired	(21,224)	(6,666)
Net cash used in financing activities	(32,368)	(26,549)
Net decrease in cash and cash equivalents	(4,251)	(12,835)
Cash and cash equivalents, beginning of period	91,019	100,398
Cash and cash equivalents, end of period	86,768	87,563
Non cash investing activities - Accrued capital expenditures	164
Non cash investing activities - Contingent consideration for purchase of equity method investment		4,611
Non cash financing activities - Cashless exercise of stock options	$ 3,186