CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenues
Lime and limestone operations	$ 31,779	$ 37,320	$ 61,141	$ 72,371
Natural gas	671	1,356	1,373	2,996
Total revenues	32,450	38,676	62,514	75,367
Cost of revenues:
Labor and other operating expenses	21,552	24,586	41,868	49,129
Depreciation, depletion and amortization	3,885	3,667	7,769	7,223
Total cost of revenues	25,437	28,253	49,637	56,352
Gross profit	7,013	10,423	12,877	19,015
Selling, general and administrative expenses	2,400	2,418	4,799	4,600
Operating profit	4,613	8,005	8,078	14,415
Other expenses (income):
Interest expense	590	408	912	807
Other expense (income), net	712	(55)	705	(53)
Total other expense (income)	1,302	353	1,617	754
Income before income taxes	3,311	7,652	6,461	13,661
Income tax expense	752	1,934	1,537	3,451
Net income	$ 2,559	$ 5,718	$ 4,924	$ 10,210
Income per share of common stock:
Basic (in dollars per share)	$ 0.46	$ 1.03	$ 0.88	$ 1.83
Diluted (in dollars per share)	0.46	1.02	0.88	1.83
Cash dividends per share of common stock (in dollars per share)	$ 0.125	$ 0.125	$ 0.250	$ 0.250