Condensed Consolidated Balance Sheets (USD $)	Mar. 31, 2012	Dec. 31, 2011
ASSETS
Cash and cash equivalents	$ 862,395	$ 1,123,870
Receivables, less allowances of $590,000 in 2012 and $670,000 in 2011 for doubtful accounts	15,285,459	15,970,034
Inventories, priced at cost which is not in excess of market-
Finished cement	4,806,143	3,963,233
Work in process	807,422	1,353,361
Building products	4,658,924	4,236,266
Fuel, gypsum, paper sacks and other	6,658,379	6,416,618
Operating and maintenance supplies	12,315,510	11,892,887
Total inventories	29,246,378	27,862,365
Refundable federal and state income taxes	1,206,199	353,199
Deferred income taxes	750,000	750,000
Prepaid expenses	1,116,806	631,461
Total current assets	48,467,237	46,690,929
PROPERTY, PLANT AND EQUIPMENT, at cost, less accumulated depreciation and depletion of $185,091,164 in 2012 and $182,427,598 in 2011	85,571,904	86,719,411
DEFERRED INCOME TAXES	16,886,410	18,416,410
INVESTMENTS	23,269,203	20,026,704
OTHER ASSETS	1,729,532	1,801,356
Total Assets	175,924,286	173,654,810
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	7,609,067	5,451,853
Line of credit payable	6,823,843	4,844,469
Current portion of term loan	2,943,593	2,920,023
Current portion of other long-term debt	175,000	175,000
Accrued liabilities	5,765,769	7,883,704
Total current liabilities	23,317,272	21,275,049
LONG-TERM DEBT	6,514,542	7,303,137
ACCRUED POSTRETIREMENT BENEFITS	33,744,926	33,327,243
ACCRUED PENSION EXPENSE	14,185,503	13,676,003
STOCKHOLDERS' EQUITY:
Capital Stock	6,425,535	6,424,578
Additional paid-in-capital	2,485,125	2,485,125
Retained earnings	95,511,867	97,751,202
Accumulated other comprehensive loss	(9,869,034)	(12,197,034)
Total stockholders' equity	98,162,043	98,073,378
Liabilities and Equity, Total	175,924,286	173,654,810
Class B Capital Stock [Member]
STOCKHOLDERS' EQUITY:
Capital Stock	$ 3,608,550	$ 3,609,507