CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Revenues
Lime and limestone operations	$ 34,729	$ 33,382	$ 68,634	$ 63,584
Natural gas interests	1,769	3,458	3,892	6,322
Total revenues	36,498	36,840	72,526	69,906
Cost of revenues:
Labor and other operating expenses	24,444	23,058	47,701	43,344
Depreciation, depletion and amortization	3,701	3,383	7,269	6,751
Total cost of revenues	28,145	26,441	54,970	50,095
Gross profit	8,353	10,399	17,556	19,811
Selling, general and administrative expenses	2,327	2,081	4,594	4,266
Operating profit	6,026	8,318	12,962	15,545
Other expense (income):
Interest expense	542	627	1,118	1,280
Other, net	(77)	(42)	(51)	(63)
Total other expense (income)	465	585	1,067	1,217
Income before income taxes	5,561	7,733	11,895	14,328
Income tax expense	1,501	1,938	3,211	3,719
Net income	$ 4,060	$ 5,795	$ 8,684	$ 10,609
Income per share of common stock:
Basic (in dollars per share)	$ 0.73	$ 0.90	$ 1.48	$ 1.65
Diluted (in dollars per share)	$ 0.73	$ 0.90	$ 1.48	$ 1.65