Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Utility plant:
Land	$ 10,418	$ 10,156
Depreciable plant and equipment	1,254,586	1,166,220
Construction in progress	30,846	24,298
Intangible assets	18,341	15,561
Property, Plant and Equipment, Gross	1,314,191	1,216,235
Less accumulated depreciation and amortization	415,453	384,675
Public Utilities, Property, Plant and Equipment, Net	898,738	831,560
Real estate investment	78,477	74,232
Less accumulated depreciation and amortization	10,658	9,045
Property, Plant and Equipment, Net	67,819	65,187
Current assets:
Cash and cash equivalents	2,299	2,522
Accounts receivable:
Customers, net of allowances for uncollectible accounts of $170 and $225 in 2013 and 2012, respectively	14,496	12,317
Income tax	1,661	489
Other	476	854
Accrued unbilled utility revenue	17,556	16,284
Long-lived assets held-for-sale	0	7,768
Materials and supplies	1,045	1,088
Prepaid expenses	2,119	1,589
Assets, Current	39,652	42,911
Other assets:
Investment in California Water Service Group	8,885	7,067
Unamortized debt issuance, broker and reacquisition costs	5,176	5,226
Regulatory assets, net	83,543	130,488
Other	6,173	5,060
Assets, Noncurrent	103,777	147,841
Assets	1,109,986	1,087,499
Shareholders' equity:
Common stock, $0.521 par value; authorized 36,000,000 shares; issued and outstanding 20,169,211 shares in 2013 and 18,670,566 shares in 2012	10,505	9,724
Additional paid-in capital	63,017	26,117
Retained earnings	244,266	236,453
Accumulated other comprehensive income	3,387	2,310
Total shareholders' equity	321,175	274,604
Long-term debt, less current portion	334,997	335,598
Capitalization, Long-term Debt and Equity	656,172	610,202
Current liabilities:
Line of credit	22,400	15,300
Current portion of long-term debt	554	5,392
Accrued groundwater extraction charges and purchased water	7,116	4,755
Purchased power	665	317
Accounts payable	12,587	8,481
Accrued interest	5,369	5,355
Accrued property taxes and other non-income taxes	1,618	1,465
Accrued payroll	3,198	3,069
Other current liabilities	5,688	4,973
Liabilities, Current	59,195	49,107
Deferred income taxes	140,736	147,579
Unamortized investment tax credits	1,375	1,434
Advances for construction	70,043	68,277
Contributions in aid of construction	132,260	128,466
Deferred revenue	1,213	1,137
Postretirement benefit plans	43,496	73,425
Other noncurrent liabilities	5,496	7,872
Commitments and contingencies	0	0
Liabilities and Equity	$ 1,109,986	$ 1,087,499