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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Operating revenues        
Water sales $ 16,316 $ 17,353 $ 47,002 $ 48,597
Other utility operating revenue 731 719 2,220 2,166
Non-utility operating revenue 1,026 929 2,959 2,848
Total Operating Revenues 18,073 19,001 52,181 53,611
Operating expenses        
Utility operating expenses 8,415 9,155 25,616 25,391
Non-utility operating expenses 511 515 1,598 1,562
Depreciation and amortization 2,066 1,957 6,164 5,880
State and federal income taxes 1,740 1,904 4,541 5,435
Property and other taxes 1,017 975 3,054 2,965
Total Operating Expenses 13,749 14,506 40,973 41,233
Operating income 4,324 4,495 11,208 12,378
Other income (expense), net        
Allowance for funds used during construction (AFUDC) 99 133 244 253
Miscellaneous (37) (36) 595 748
Income before interest charges 4,386 4,592 12,047 13,379
Interest charges 1,784 1,746 5,293 5,280
Net income $ 2,602 $ 2,846 $ 6,754 $ 8,099
Income per common share:        
Basic (in dollars per share) $ 0.30 $ 0.33 $ 0.77 $ 0.94
Diluted (in dollars per share) $ 0.29 $ 0.33 $ 0.77 $ 0.93
Weighted average common shares outstanding        
Basic (in shares) 8,789 8,681 8,759 8,653
Diluted (in shares) 8,850 8,752 8,822 8,699
Cash dividends per share of common stock $ 0.2057 $ 0.1978 $ 0.6141 $ 0.5886