Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
OPERATING REVENUE	$ 82,374	$ 73,914	$ 199,098	$ 176,617
OPERATING EXPENSE:
Purchased water	22,768	19,182	54,128	39,279
Power	2,274	1,979	4,442	4,366
Groundwater extraction charges	8,672	7,824	17,057	17,632
Other production costs	2,914	3,030	8,511	8,442
Total production costs	36,628	32,015	84,138	69,719
Administrative and general	10,773	9,882	32,067	29,176
Maintenance	3,411	3,331	9,533	9,855
Property taxes and other non-income taxes	2,397	2,397	7,251	6,607
Depreciation and amortization	8,288	7,803	24,922	23,389
Total operating expense	61,497	55,428	157,911	138,746
OPERATING INCOME	20,877	18,486	41,187	37,871
OTHER (EXPENSE) INCOME:
Interest on long-term debt	(4,683)	(4,684)	(14,022)	(13,175)
Mortgage and other interest expense	(380)	(436)	(1,166)	(1,358)
Gain on sale of real estate investment	910	0	910	0
Dividend income	61	59	182	179
Other, net	165	150	525	369
Income before income taxes	16,950	13,575	27,616	23,886
Provision for income taxes	6,866	5,360	11,222	9,610
NET INCOME	10,084	8,215	16,394	14,276
Other comprehensive income (loss), net	41	(227)	89	(210)
COMPREHENSIVE INCOME	$ 10,125	$ 7,988	$ 16,483	$ 14,066
EARNINGS PER SHARE
Basic	$ 0.54	$ 0.44	$ 0.88	$ 0.77
Diluted	$ 0.53	$ 0.44	$ 0.87	$ 0.76
DIVIDENDS PER SHARE	$ 0.18	$ 0.17	$ 0.53	$ 0.52
WEIGHTED AVERAGE SHARES OUTSTANDING
Basic	18,647,537	18,586,887	18,628,680	18,578,146
Diluted	18,854,042	18,802,606	18,833,271	18,787,623