Lines of Business (Summary Of Business Segment) (Details) (USD $)	3 Months Ended	9 Months Ended
Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Segment Reporting Information [Line Items]
Sales to unaffiliated customers	$ 44,970,920	$ 38,167,606	$ 111,764,454	$ 95,057,325
Intersegment sales	0	0	0	0
Total net sales	44,970,920	38,167,606	111,764,454	95,057,325
Income (loss) from operations	8,041,279	2,058,449	11,518,084	1,689,757
Other income, net	558,610	65,758	957,771	5,321,529
Income from continuing operations before income taxes	8,599,889	2,124,207	12,475,855	7,011,286
Capital Expenditures	1,738,065	2,495,490	9,525,045	12,438,122
Total Assets	182,408,795		182,408,795		174,105,862
Cement Business [Member]
Segment Reporting Information [Line Items]
Sales to unaffiliated customers	19,229,564	17,471,221	48,649,721	42,057,188
Intersegment sales	5,464,349	4,303,891	13,353,831	11,105,327
Total net sales	24,693,913	21,775,112	62,003,552	53,162,515
Income (loss) from operations	6,315,734	1,475,875	10,766,267	1,898,932
Capital Expenditures	1,092,642	1,719,098	4,374,020	7,966,594
Total Assets	92,994,418		92,994,418		91,279,098
Ready-Mixed Concrete Business [Member]
Segment Reporting Information [Line Items]
Sales to unaffiliated customers	25,741,356	20,696,385	63,114,733	53,000,137
Intersegment sales	6,779	0	6,779	0
Total net sales	25,748,135	20,696,385	63,121,512	53,000,137
Income (loss) from operations	1,725,545	582,574	751,817	(209,175)
Capital Expenditures	645,423	776,392	5,151,025	4,471,528
Total Assets	43,002,259		43,002,259		34,106,903
Adjustments and Elimination [Member]
Segment Reporting Information [Line Items]
Sales to unaffiliated customers	0	0	0	0
Intersegment sales	(5,471,128)	(4,303,891)	(13,360,610)	(11,105,327)
Total net sales	(5,471,128)	(4,303,891)	(13,360,610)	(11,105,327)
Identifiable [Member]
Segment Reporting Information [Line Items]
Total Assets	135,996,677		135,996,677		125,386,001
Corporate [Member]
Segment Reporting Information [Line Items]
Total Assets	$ 46,412,118		$ 46,412,118		$ 48,719,861

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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