Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
OPERATING REVENUE	$ 65,575	$ 59,007	$ 116,724	$ 102,703
OPERATING EXPENSE:
Purchased water	17,783	12,681	31,360	20,097
Power	1,303	1,373	2,168	2,387
Groundwater extraction charges	5,439	5,300	8,385	9,808
Other production costs	2,841	2,820	5,597	5,412
Total production costs	27,366	22,174	47,510	37,704
Administrative and general	10,746	9,658	21,294	19,294
Maintenance	3,133	3,476	6,122	6,524
Property taxes and other non-income taxes	2,419	2,123	4,854	4,210
Depreciation and amortization	8,326	7,792	16,634	15,586
Total operating expense	51,990	45,223	96,414	83,318
OPERATING INCOME	13,585	13,784	20,310	19,385
OTHER (EXPENSE) INCOME:
Interest on long-term debt	(4,659)	(4,235)	(9,339)	(8,491)
Mortgage and other interest expense	(391)	(447)	(786)	(922)
Dividend income	61	60	121	120
Other, net	162	106	360	219
Income before income taxes	8,758	9,268	10,666	10,311
Provision for income taxes	3,557	3,817	4,356	4,250
NET INCOME	5,201	5,451	6,310	6,061
Other comprehensive income, net	59	28	48	17
COMPREHENSIVE INCOME	$ 5,260	$ 5,479	$ 6,358	$ 6,078
EARNINGS PER SHARE
Basic	$ 0.28	$ 0.29	$ 0.34	$ 0.33
Diluted	$ 0.28	$ 0.29	$ 0.34	$ 0.32
DIVIDENDS PER SHARE	$ 0.18	$ 0.17	$ 0.36	$ 0.34
WEIGHTED AVERAGE SHARES OUTSTANDING
Basic	18,626,547	18,577,226	18,619,149	18,573,701
Diluted	18,824,481	18,784,694	18,822,784	18,780,058