CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Revenues
Lime and limestone operations	$ 29,362	$ 35,051
Natural gas	702	1,640
Total revenues	30,064	36,691
Cost of revenues:
Labor and other operating expenses	20,316	24,543
Depreciation, depletion and amortization	3,884	3,556
Total cost of revenues	24,200	28,099
Gross profit	5,864	8,592
Selling, general and administrative expenses	2,399	2,182
Operating profit	3,465	6,410
Other expenses (income):
Interest expense	322	399
Other (income) expense, net	(7)	2
Total other expense (income)	315	401
Income before income taxes	3,150	6,009
Income tax expense	785	1,517
Net income	$ 2,365	$ 4,492
Income per share of common stock:
Basic (in dollars per share)	$ 0.42	$ 0.81
Diluted (in dollars per share)	$ 0.42	$ 0.80
Cash dividends per share of common stock (in dollars per share)	$ 0.125	$ 0.125