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CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND (USD $)
In Thousands, except Share data
 3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Operating revenues        
Water sales $ 14,683 $ 13,909 $ 27,598 $ 26,804
Other utility operating revenue 711 714 1,458 1,333
Non-utility revenue 1,116 1,380 2,211 2,850
Total Operating Revenues 16,510 16,003 31,267 30,987
Operating expenses        
Utility operating expenses 8,136 7,466 16,214 14,834
Non-utility operating expenses 775 958 1,715 1,976
Depreciation and amortization 1,823 1,723 3,633 3,454
State and federal income taxes 1,260 1,209 1,954 2,326
Property and other taxes 928 1,027 1,944 1,990
Total Operating Expenses 12,922 12,383 25,460 24,580
Operating income 3,588 3,620 5,807 6,407
Other income (expense), net        
Allowance for funds used during construction (AFUDC) 38 24 73 67
Miscellaneous (25) (44) 572 567
Income before interest charges 3,601 3,600 6,452 7,041
Interest charges 1,848 1,802 3,690 3,597
Net income 1,753 1,798 2,762 3,444
Retained earnings, beginning of period 17,084 15,817 17,520 15,577
Less dividends (1,458) (1,415) (2,903) (2,821)
Retained earnings, end of period $ 17,379 $ 16,200 $ 17,379 $ 16,200
Income per common share:        
Basic (in dollars per share) $ 0.23 $ 0.24 $ 0.36 $ 0.46
Diluted (in dollars per share) $ 0.23 $ 0.24 $ 0.36 $ 0.45
Weighted average common shares outstanding        
Basic (in shares) 7,672 7,539 7,662 7,526
Diluted (in shares) 7,714 7,607 7,706 7,595
Cash dividend per common share $ 0.1902 $ 0.1882 $ 0.3794 $ 0.3755