Lines of Business (Summary Of Business Segment) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Segment Reporting Information [Line Items]
Sales to unaffiliated customers	$ 43,331,983	$ 35,525,254	$ 66,793,534	$ 56,889,719
Intersegment sales	0	0	0	0
Total net sales	43,331,983	35,525,254	66,793,534	56,889,719
Income (loss) from operations	7,199,963	3,793,473	3,476,805	(368,692)
Other income, net	341,648	1,454,799	399,161	5,255,771
Income from continuing operations before income taxes	7,541,611	5,248,272	3,875,966	4,887,079
Capital Expenditures	4,779,585	2,970,907	7,786,980	9,942,633
Total Assets	183,207,346		183,207,346		174,105,862
Cement Business [Member]
Segment Reporting Information [Line Items]
Sales to unaffiliated customers	19,484,483	16,141,303	29,420,157	24,585,967
Intersegment sales	5,024,422	3,947,779	7,889,482	6,801,436
Total net sales	24,508,905	20,089,082	37,309,639	31,387,403
Income (loss) from operations	6,480,864	3,140,627	4,450,533	423,057
Capital Expenditures	1,457,592	1,580,272	3,281,378	6,247,496
Total Assets	94,502,507		94,502,507		91,279,098
Ready-Mixed Concrete Business [Member]
Segment Reporting Information [Line Items]
Sales to unaffiliated customers	23,847,500	19,383,951	37,373,377	32,303,752
Intersegment sales	0	0	0	0
Total net sales	23,847,500	19,383,951	37,373,377	32,303,752
Income (loss) from operations	719,099	652,846	(973,728)	(791,749)
Capital Expenditures	3,321,993	1,390,635	4,505,602	3,695,137
Total Assets	43,395,589		43,395,589		34,106,903
Adjustments and Elimination [Member]
Segment Reporting Information [Line Items]
Sales to unaffiliated customers	0	0	0	0
Intersegment sales	(5,024,422)	(3,947,779)	(7,889,482)	(6,801,436)
Total net sales	(5,024,422)	(3,947,779)	(7,889,482)	(6,801,436)
Identifiable [Member]
Segment Reporting Information [Line Items]
Total Assets	137,898,096		137,898,096		125,386,001
Corporate [Member]
Segment Reporting Information [Line Items]
Total Assets	$ 45,309,250		$ 45,309,250		$ 48,719,861