Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
OPERATING ACTIVITIES:
Net income	$ 1,285	$ 3,671
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	14,160	12,646
Deferred income taxes	(1,383)	1,595
Share-based compensation	487	586
Unrealized loss on California Water Service Group stock	667	0
Loss on sale of California Water Service Group stock	87	0
Changes in operating assets and liabilities:
Accounts receivable and accrued unbilled utility revenue	4,530	6,015
Accounts payable and other current liabilities	784	557
Accrued groundwater extraction charges, purchased water and power	(2,690)	(454)
Tax payable and receivable, and other accrued taxes	2,465	1,090
Postretirement benefits	1,894	1,915
Regulatory assets and liability related to balancing and memorandum accounts	2,350	1,917
Other changes, net	(2,054)	(1,296)
NET CASH PROVIDED BY OPERATING ACTIVITIES	22,582	28,242
INVESTING ACTIVITIES:
Company-funded	(28,961)	(27,745)
Contributions in aid of construction	(1,468)	(1,646)
Additions to real estate investments	0	(62)
Payments to retire utility plant, net of salvage	(1,134)	(397)
Payments for business/asset acquisition and water rights	0	1,101
NET CASH USED IN INVESTING ACTIVITIES	(31,563)	(30,951)
FINANCING ACTIVITIES:
Borrowings on line of credit	14,000	0
Repayments of line of credit	0	(14,200)
Repayments of long-term borrowings	0	(32)
Dividends paid	(5,754)	(4,456)
Receipts of advances and contributions in aid of construction	2,148	3,924
Refunds of advances for construction	(537)	(532)
Other changes, net	(1,721)	(245)
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	8,136	(15,541)
NET CHANGE IN CASH AND CASH EQUIVALENTS	(845)	(18,250)
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, BEGINNING OF PERIOD	7,799	25,350
CASH AND CASH EQUIVALENTS, END OF PERIOD	6,954	7,100
Cash paid during the period for:
Interest	6,042	6,044
Income taxes	85	0
Supplemental disclosure of non-cash activities:
Change in accrued payables for construction costs capitalized	(790)	1,634
Utility property installed by developers	590	243
RECONCILIATION TO CONSOLIDATED BALANCE SHEETS:
Cash and cash equivalents	6,954	7,092
Restricted cash	$ 0	$ 8