CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenues
Lime and limestone operations	$ 37,320	$ 33,684	$ 72,371	$ 63,839
Natural gas interests	1,356	1,488	2,996	2,918
Total revenues	38,676	35,172	75,367	66,757
Cost of revenues:
Labor and other operating expenses	24,586	22,609	49,129	44,250
Depreciation, depletion and amortization	3,667	3,599	7,223	7,252
Total cost of revenues	28,253	26,208	56,352	51,502
Gross profit	10,423	8,964	19,015	15,255
Selling, general and administrative expenses	2,418	2,299	4,600	4,442
Operating profit	8,005	6,665	14,415	10,813
Other expense (income):
Interest expense	408	465	807	954
Other, net	(55)	(36)	(53)	(74)
Total other expense (income)	353	429	754	880
Income before income taxes	7,652	6,236	13,661	9,933
Income tax expense	1,934	1,610	3,451	2,551
Net income	$ 5,718	$ 4,626	$ 10,210	$ 7,382
Income per share of common stock:
Basic (in dollars per share)	$ 1.03	$ 0.83	$ 1.83	$ 1.33
Diluted (in dollars per share)	$ 1.02	$ 0.83	$ 1.83	$ 1.33
Cash dividend per share of common stock (in dollars per share)	$ 0.125		$ 0.250