LONG-TERM DEBT (Tables)

12 Months Ended

Dec. 31, 2017

Long-term Debt, Unclassified [Abstract]

Schedule of long-term debt outstanding

As of December 31, 2017 and 2016, long-term debt outstanding was:

	Series	Interest Rate		Maturity Date	2017			2016
First Mortgage Bonds	TTT	4.610	%	2056	$	10,000		$	10,000
	SSS	4.410	%	2046	40,000			40,000
	QQQ	3.330	%	2025	50,000			50,000
	RRR	4.310	%	2045	50,000			50,000
	PPP	5.500	%	2040	100,000			100,000
	LL	5.875	%	2019	100,000			100,000
	AAA	7.280	%	2025	20,000			20,000
	BBB	6.770	%	2028	20,000			20,000
	CCC	8.150	%	2030	20,000			20,000
	DDD	7.130	%	2031	20,000			20,000
	EEE	7.110	%	2032	20,000			20,000
	FFF	5.900	%	2017	—			20,000
	GGG	5.290	%	2022	9,091			10,909
	HHH	5.290	%	2022	9,091			10,909
	III	5.540	%	2023	5,454			6,364
	JJJ	5.440	%	2018	909			1,818
	LLL	5.480	%	2018	10,000			10,000
	OOO	6.020	%	2031	20,000			20,000
	CC	9.860	%	2020	16,900			17,000
Total First Mortgage Bonds					521,445			547,000
California Department of Water Resources Loans		2.6% to 8.0%		2018 - 32	6,201			6,519
Other Long-term debt					7,956			8,909
Unamortized debt issuance costs					(3,889		)	(4,475		)
Total long-term debt					531,713			557,953
Less current maturities					15,920			26,208
Long-term debt excluding current maturities					$	515,793		$	531,745