Condensed Consolidated Statements Of Cash Flows (USD $)	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
OPERATING ACTIVITIES:
Net loss	$ (321,857)	$ (957,009)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation, depletion and amortization	8,553,737	8,766,192
Deferred income taxes, long-term	758,300	164,000
Gain on disposal of assets	(250,501)	(29,688)
Realized gain on sale of equity investments	(5,197,438)	(11,839)
Realized loss on impairment of equity investments	415,287	858,787
Gain on disposal of other assets	0	(700,000)
Postretirement benefits and pension expense	1,698,305	2,674,431
Change in assets and liabilities:
Receivables, net	(5,794,228)	(5,064,425)
Inventories	2,979,281	1,266,161
Refundable income taxes	(1,135,677)	(270,449)
Prepaid expenses	(925,177)	(442,518)
Other assets	2,250	1,692
Accounts payable and accrued liabilities	454,034	(990,587)
Net cash provided by operating activities	1,236,316	5,264,748
INVESTING ACTIVITIES:
Acquisition of property, plant and equipment	(5,601,076)	(4,836,923)
Proceeds from disposals of property, plant and equipment	287,924	52,618
Proceeds from disposals of other assets	0	700,000
Payment for acquisition of business, net of cash acquired	(534,392)	0
Payment for purchases of equity investments	(2,389,924)	(860,134)
Proceeds from disposals of equity investments	7,878,129	205,487
Increase in short-term investments, net	(10,166)	0
Net cash used for investing activities	(369,505)	(4,738,952)
FINANCING ACTIVITIES:
Increase in line of credit, net	6,388,069	4,904,271
Payments on bank loans	(2,238,756)	(2,040,889)
Payments on other long-term debt	(581,401)	(85,441)
Cash dividends paid	(3,720,289)	(3,702,262)
Purchases of capital stock	(2,483,069)	(273,901)
Net cash used for financing activities	(2,635,446)	(1,198,222)
Net decrease in cash and cash equivalents	(1,768,635)	(672,426)
Cash and Cash Equivalents, beginning of year	2,695,267	2,149,397
Cash and Cash Equivalents, end of period	926,632	1,476,971
Supplemental disclosures:
Interest paid, net of amount capitalized	380,048	442,149
Income taxes paid, net of refunds	385,527	1,617
Capital equipment additions included in accounts payable	75,823	32,335
Non-cash investing activities:
Issuance of 105,750 shares of capital stock related to acquisition of business	2,749,500	0
Note payable related to acquisition of business	$ 927,443	$ 0