STATEMENTS OF CASH FLOWS (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Cash Received -
Oil and Gas Sales	$ 13,005,197	$ 12,112,905
Lease Bonuses and Coal Royalties	2,295,880	688,287
Sale of Trading Securities	733,913	886,263
Interest Received	31,476	29,462
Agricultural Rentals and Other	6,318	5,781
Dividends Received on Trading Securities	1,678	3,878
Cash Paid -
Production Costs	(2,390,344)	(2,014,775)
General Suppliers, Employees and Taxes, Other than Income Taxes	(1,600,374)	(1,430,493)
Interest Paid	(4,432)	(3,854)
Purchase of Trading Securities	(735,580)	(889,675)
Income Taxes Paid, Net	(889,350)	(1,173,329)
Farm Expense	(370)	(20,317)
Net Cash Provided by Operating Activities	10,454,012	8,194,133
Cash Flows Provided by/(Applied to) Investing Activities:
Maturity of Available-for-Sale Securities	13,307,033	26,032,687
Purchase of Available-for-Sale Securities	(13,304,785)	(19,548,714)
Proceeds from Disposal of Property, Plant and Equipment	499,553	1,259,623
Purchase of Property, Plant and Equipment	(7,167,669)	(7,095,101)
Cash Distributions from Equity and Other Investments	44,200	3,000
Repayments from Equity Investees		50,000
Net Cash Provided by/(Applied to) Investing Activities	(6,621,668)	701,495
Cash Flows Applied to Financing Activities:
Dividends Paid to Stockholders	(3,100,835)	(1,644,413)
Purchase of Treasury Stock	(39,940)	(41,440)
Total Cash Applied to Financing Activities	(3,140,775)	(1,685,853)
Net Change in Cash and Cash Equivalents	691,569	7,209,775
Cash and Cash Equivalents at Beginning of Year	10,150,742	2,940,967
Cash and Cash Equivalents at End of Year	10,842,311	10,150,742
Net Income	4,553,845	5,279,039
Unrealized Holding Gains on Trading Securities	17,655	91,906
Accounts Receivable	168,652	(159,942)
Interest and Dividends Receivable	(958)	6,688
Refundable Income Taxes	298,048	(534,293)
Accounts Payable	118,146	36,768
Trading Securities	(8,028)	(76,745)
Other Assets	(1,920)	(5,842)
Deferred Taxes	464,423	1,176,826
Other Liabilities	(1,330)	24,540
Income from Equity and Other Investments	(117,203)	(38,884)
Exploratory Costs	228,405	305,762
Disposition of Property, Plant and Equipment	(452,590)	(1,091,224)
Depreciation, Depletion, Amortization and Valuation Provisions	5,186,867	3,179,534
Net Cash Provided by Operating Activities	$ 10,454,012	$ 8,194,133