Condensed Consolidated Statements of Income and Comprehensive Income (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
OPERATING REVENUE	$ 73,914	$ 70,347	$ 176,617	$ 164,886
OPERATING EXPENSE:
Purchased water	19,182	16,574	39,279	33,728
Power	1,979	2,122	4,366	4,850
Groundwater extraction charges	7,824	8,736	17,632	19,969
Other production costs	3,030	2,726	8,442	7,832
Total production costs	32,015	30,158	69,719	66,379
Administrative and general	9,882	10,234	29,176	27,861
Maintenance	3,331	2,895	9,855	8,960
Property taxes and other non-income taxes	2,397	2,056	6,607	5,819
Depreciation and amortization	7,803	7,082	23,389	21,263
Total operating expense	55,428	52,425	138,746	130,282
OPERATING INCOME	18,486	17,922	37,871	34,604
OTHER (EXPENSE) INCOME:
Interest on long-term debt	(4,684)	(4,166)	(13,175)	(11,424)
Mortgage and other interest expense	(436)	(486)	(1,358)	(1,555)
Gain on sale of California Water Service Group stock	0	4,466	0	4,466
Dividend income	59	239	179	893
Other, net	150	145	369	420
Income before income taxes	13,575	18,120	23,886	27,404
Provision for income taxes	5,360	7,333	9,610	11,116
NET INCOME	8,215	10,787	14,276	16,288
Other comprehensive income (loss):
Unrealized income (loss) on investment	(385)	(3,188)	(356)	(4,420)
Less: income taxes related to other comprehensive income (loss)	158	1,307	146	1,812
Other comprehensive income (loss), net	(227)	(1,881)	(210)	(2,608)
COMPREHENSIVE INCOME	$ 7,988	$ 8,906	$ 14,066	$ 13,680
EARNINGS PER SHARE
Basic	$ 0.44	$ 0.58	$ 0.77	$ 0.88
Diluted	$ 0.44	$ 0.58	$ 0.76	$ 0.87
DIVIDENDS PER SHARE	$ 0.17	$ 0.17	$ 0.52	$ 0.51
WEIGHTED AVERAGE SHARES OUTSTANDING
Basic	18,587	18,537	18,578	18,528
Diluted	18,803	18,752	18,788	18,738