CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenues
Lime and limestone operations	$ 35,498	$ 32,558	$ 99,337	$ 101,192
Natural gas interests	1,401	1,558	4,319	5,450
Total revenues	36,899	34,116	103,656	106,642
Cost of revenues:
Labor and other operating expenses	24,200	22,620	68,450	70,321
Depreciation, depletion and amortization	3,589	3,737	10,841	11,006
Total cost of revenues	27,789	26,357	79,291	81,327
Gross profit	9,110	7,759	24,365	25,315
Selling, general and administrative expenses	2,223	2,090	6,665	6,684
Operating profit	6,887	5,669	17,700	18,631
Other expense (income):
Interest expense	451	539	1,405	1,657
Other, net	59	(16)	(15)	(67)
Total other expense (income)	510	523	1,390	1,590
Income before income taxes	6,377	5,146	16,310	17,041
Income tax expense	1,588	1,199	4,139	4,410
Net income	$ 4,789	$ 3,947	$ 12,171	$ 12,631
Income per share of common stock:
Basic (in dollars per share)	$ 0.86	$ 0.71	$ 2.19	$ 2.19
Diluted (in dollars per share)	$ 0.86	$ 0.71	$ 2.19	$ 2.19