XML 41 R29.htm IDEA: XBRL DOCUMENT v3.7.0.1
Business Segments (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
USD ($)
Jun. 30, 2016
USD ($)
Jun. 30, 2017
USD ($)
segment
Jun. 30, 2016
USD ($)
Business segments        
Number of business segments | segment     2  
Revenues $ 36,518 $ 32,880 $ 72,671 $ 66,466
Depreciation, depletion and amortization 4,054 3,929 8,290 7,838
Gross profit (loss) 8,838 7,241 17,076 15,089
Capital expenditures 4,376 3,966 8,585 7,900
Lime and limestone operations        
Business segments        
Revenues 35,965 32,376 71,482 65,530
Depreciation, depletion and amortization 3,855 3,738 7,886 7,452
Gross profit (loss) 8,722 7,245 16,742 15,174
Capital expenditures 4,376 3,966 8,583 7,896
Natural gas interests        
Business segments        
Revenues 553 504 1,189 936
Depreciation, depletion and amortization 199 191 404 386
Gross profit (loss) $ 116 $ (4) 334 (85)
Capital expenditures     $ 2 $ 4