XML 74 R58.htm IDEA: XBRL DOCUMENT v3.8.0.1
Business Segment Data (Details)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2017
USD ($)
Sep. 30, 2017
USD ($)
Jun. 30, 2017
USD ($)
Mar. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Sep. 30, 2016
USD ($)
Jun. 30, 2016
USD ($)
Mar. 31, 2016
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Segment Reporting Information [Line Items]                      
Number of Reportable Segments                 2 2  
Revenues $ 31,456 $ 36,174 $ 33,014 $ 30,131 $ 31,808 $ 37,754 $ 32,725 $ 30,579 $ 130,775 $ 132,906 $ 126,025
Operating Income 8,471 12,806 9,563 7,780 7,846 14,156 10,328 8,302 38,620 40,632 35,840
Depreciation                 13,922 12,796 12,051
Other Income (Expense), Net                 795 (862) 293
Interest Expense                 5,506 5,293 5,554
Income Taxes                 11,100 11,735 10,551
Net Income 5,345 $ 7,642 $ 5,381 $ 4,441 3,220 $ 8,813 $ 5,919 $ 4,790 22,809 22,742 20,028
Capital Expenditures                 50,301 47,375 25,773
Assets 661,140       620,161       661,140 620,161  
Inter-segment Elimination [Member]                      
Segment Reporting Information [Line Items]                      
Revenues                 (591) (499) (460)
Other Income (Expense), Net                 (467) (333) (346)
Interest Expense                 (467) (89) (89)
Assets (7,769)       (5,999)       (7,769) (5,999)  
Regulated [Member]                      
Segment Reporting Information [Line Items]                      
Revenues                 115,454 118,017 111,247
Operating Income                 35,952 38,201 33,603
Depreciation                 13,732 12,606 11,874
Other Income (Expense), Net                 1,198 779 619
Interest Expense                 5,855 5,293 5,554
Income Taxes                 9,848 11,091 9,522
Net Income                 21,447 22,353 18,889
Capital Expenditures                 50,078 47,189 25,706
Assets 661,816       619,915       661,816 619,915  
Non - Regulated [Member]                      
Segment Reporting Information [Line Items]                      
Revenues                 15,912 15,388 15,238
Operating Income                 2,668 2,431 2,237
Depreciation                 190 190 177
Other Income (Expense), Net                 64 (1,308) 20
Interest Expense                 118 89 89
Income Taxes                 1,252 644 1,029
Net Income                 1,362 389 1,139
Capital Expenditures                 223 186 $ 67
Assets $ 7,093       $ 6,245       $ 7,093 $ 6,245