Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Utility plant:
Land	$ 8,852	$ 8,579
Depreciable plant and equipment	1,070,016	1,004,689
Construction in progress	18,527	10,103
Intangible assets	14,732	13,538
Property, Plant and Equipment, Gross	1,112,127	1,036,909
Less accumulated depreciation and amortization	355,914	322,102
Public Utilities, Property, Plant and Equipment, Net	756,213	714,807
Real estate investment	89,099	88,943
Less accumulated depreciation and amortization	10,557	8,854
Property, Plant and Equipment, Net	78,542	80,089
Current assets:
Cash and cash equivalents	26,734	1,730
Accounts receivable:
Customers, net of allowances for uncollectible accounts	12,541	12,491
Income tax	5,248	7,634
Other	746	993
Accrued unbilled utility revenue	15,318	12,717
Materials and supplies	991	989
Prepaid expenses	1,598	1,473
Other current asset	5,739	0
Assets, Current	68,915	38,027
Other assets:
Investment in California Water Service Group	7,032	7,177
Debt issuance costs and broker fees, net of accumulated amortization	4,865	4,308
Regulatory assets, net	119,248	87,721
Other	3,995	3,233
Assets, Noncurrent	135,140	102,439
Assets	1,038,810	935,362
Shareholders’ equity:
Common stock, $0.521 par value; authorized 36,000,000 shares; issued and outstanding 18,592,827 shares in 2011 and 18,551,540 shares in 2010	9,684	9,662
Additional paid-in capital	24,552	23,443
Retained earnings	227,494	219,568
Accumulated other comprehensive income	2,274	2,359
Total shareholders’ equity	264,004	255,032
Long-term debt, less current portion	343,848	295,704
Capitalization, Long-term Debt and Equity	607,852	550,736
Current liabilities:
Line of credit	0	4,000
Current portion of long-term debt	838	1,133
Accrued groundwater extraction charges and purchased water	5,789	4,359
Purchased power	423	495
Accounts payable	7,417	5,487
Accrued interest	5,376	5,244
Accrued property taxes and other non-income taxes	1,298	1,288
Accrued payroll	2,744	2,720
Other current liabilities	4,403	4,429
Liabilities, Current	28,288	29,155
Deferred income taxes	133,541	106,406
Unamortized investment tax credits	1,495	1,555
Advances for construction	67,333	68,352
Contributions in aid of construction	123,335	121,803
Deferred revenue	1,070	1,100
Postretirement benefit plans	68,855	50,213
Other noncurrent liabilities	7,041	6,042
Commitments and contingencies	0	0
Liabilities and Stockholders' Equity	$ 1,038,810	$ 935,362