Regulatory Assets and Liabilities (Tables)

3 Months Ended

Mar. 31, 2018

Regulated Operations [Abstract]

Schedule of regulatory assets and liabilities

Regulatory assets and liabilities were comprised of the following as of March 31, 2018 and December 31, 2017:

	March 31, 2018		December 31, 2017
Regulatory Assets
Pension and retiree group health	$	214,084	$	214,249
Property-related temporary differences (tax benefits flowed through to customers)	87,700		87,323
Other accrued benefits	29,073		28,251
Net WRAM and MCBA long-term accounts receivable	35,278		34,879
Asset retirement obligations, net	17,473		17,126
Interim rates long-term accounts receivable	4,568		4,568
Tank coating	11,052		10,998
Health care balancing account	522		496
Pension balancing account	3,742		2,322
Other components of net periodic benefit cost	811		—
Other regulatory assets	738		935
Total Regulatory Assets	$	405,041	$	401,147
Regulatory Liabilities
Future tax benefits due to customers	$	168,366	$	168,343
Health care balancing account	9,282		7,749
Conservation program	3,797		2,273
Pension balancing account	154		364
Net WRAM and MCBA long-term payable	2,035		513
Tax accounting memorandum account	1,982		—
Cost of capital memorandum account	1,151		—
Other regulatory liabilities	299		464
Total Regulatory Liabilities	$	187,066	$	179,706