CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Revenues
Lime and limestone operations	$ 33,905	$ 30,202
Natural gas interests	2,123	2,864
Total revenues	36,028	33,066
Cost of revenues:
Labor and other operating expenses	23,257	20,286
Depreciation, depletion and amortization	3,568	3,368
Total cost of revenues	26,825	23,654
Gross profit	9,203	9,412
Selling, general and administrative expenses	2,267	2,185
Operating profit	6,936	7,227
Other expense (income):
Interest expense	576	653
Other, net	26	(21)
Total other expense (income)	602	632
Income before income taxes	6,334	6,595
Income tax expense	1,710	1,782
Net income	$ 4,624	$ 4,813
Income per share of common stock:
Basic (in dollars per share)	$ 0.75	$ 0.75
Diluted (in dollars per share)	$ 0.75	$ 0.75