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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Operating revenues        
Total Operating Revenues $ 22,562 $ 21,752 $ 43,297 $ 41,653
Operating expenses        
Utility operating expenses 9,754 9,359 19,350 18,593
Non-utility operating expenses 862 733 1,777 1,462
Depreciation and amortization 2,976 2,693 5,988 5,445
State and federal income taxes 1,542 1,537 2,893 2,896
Property and other taxes 1,341 1,306 2,761 2,672
Total Operating Expenses 16,475 15,628 32,769 31,068
Operating income 6,087 6,124 10,528 10,585
Other income, net        
Allowance for funds used during construction (AFUDC) 371 338 615 762
Miscellaneous (expense) income (59) (13) 1,343 1,075
Income before interest charges 6,399 6,449 12,486 12,422
Interest charges 1,894 1,883 3,775 3,782
Net income applicable to common stock $ 4,505 $ 4,566 $ 8,711 $ 8,640
Income per common share:        
Basic (in dollars per share) $ 0.48 $ 0.49 $ 0.93 $ 0.93
Diluted (in dollars per share) $ 0.48 $ 0.49 $ 0.93 $ 0.92
Weighted average common shares outstanding:        
Basic (in shares) 9,395 9,326 9,381 9,311
Diluted (in shares) 9,425 9,367 9,416 9,357
Cash dividends per share of common stock (in dollars per share) $ 0.2610 $ 0.2496 $ 0.5181 $ 0.4992
Water Sales [Member]        
Operating revenues        
Total Operating Revenues $ 20,078 $ 19,423 $ 37,908 $ 36,816
Other Utility Operating Revenue [Member]        
Operating revenues        
Total Operating Revenues 1,107 1,084 2,574 2,336
Non-Utility Operating Revenue [Member]        
Operating revenues        
Total Operating Revenues $ 1,377 $ 1,245 $ 2,815 $ 2,501