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Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
REVENUE	$ 77,682	$ 75,042
Production Expenses:
Purchased water	13,662	15,416
Power	1,160	1,268
Groundwater extraction charges	6,863	9,532
Other production expenses	5,099	4,212
Total production expenses	26,784	30,428
Administrative and general	12,291	11,568
Maintenance	4,325	4,460
Property taxes and other non-income taxes	4,128	3,866
Depreciation and amortization	15,145	13,583
Merger related expenses	2,601	3,806
Total operating expense	65,274	67,711
OPERATING INCOME	12,408	7,331
OTHER (EXPENSE) INCOME:
Interest on long-term debt and other interest expense	(5,791)	(6,052)
Pension non-service cost	(921)	(583)
Unrealized loss on California Water Service Group stock	0	(667)
Interest income on money market fund	1,832	0
Other, net	390	676
Income before income taxes	7,918	705
Provision for income taxes	2,045	(580)
NET INCOME	5,873	1,285
COMPREHENSIVE INCOME	$ 5,873	$ 1,285
EARNINGS PER SHARE
Basic (usd per share)	$ 0.21	$ 0.06
Diluted (usd per share)	0.21	0.06
DIVIDENDS PER SHARE (usd per share)	$ 0.30	$ 0.28
WEIGHTED AVERAGE SHARES OUTSTANDING
Basic (shares)	28,423,214	20,561,329
Diluted (shares)	28,507,738	20,701,031

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