Regulatory Assets and Liabilities (Tables)

6 Months Ended

Jun. 30, 2018

Regulated Operations [Abstract]

Schedule of regulatory assets and liabilities

Regulatory assets and liabilities were comprised of the following as of June 30, 2018 and December 31, 2017:

	June 30, 2018		December 31, 2017
Regulatory Assets
Pension and retiree group health	$	213,920	$	214,249
Property-related temporary differences (tax benefits flowed through to customers)	87,988		87,323
Other accrued benefits	28,741		28,251
Net WRAM and MCBA long-term accounts receivable	32,892		34,879
Asset retirement obligations, net	17,824		17,126
Interim rates long-term accounts receivable	4,568		4,568
Tank coating	11,467		10,998
Health care balancing account	442		496
Pension balancing account	5,136		2,322
Other components of net periodic benefit cost	1,754		—
Other regulatory assets	565		935
Total Regulatory Assets	$	405,297	$	401,147
Regulatory Liabilities
Future tax benefits due to customers	$	168,384	$	168,343
Health care balancing account	11,127		7,749
Conservation program	4,531		2,273
Pension balancing account	13		364
Net WRAM and MCBA long-term payable	938		513
Tax accounting memorandum account	4,767		—
Cost of capital memorandum account	2,834		—
Other regulatory liabilities	161		464
Total Regulatory Liabilities	$	192,755	$	179,706