Regulatory Assets and Liabilities (Tables)

3 Months Ended

Mar. 31, 2018

Regulatory Assets and Liabilities Disclosure [Abstract]

Schedule of Regulatory Assets

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

	March 31, 2018		December 31, 2017
Regulatory assets:
Postretirement pensions and other medical benefits	$	68,556	68,556
Balancing and memorandum accounts, net	25,575		27,925
Other, net	3,162		3,073
Total regulatory assets, net in Consolidated Balance Sheets	$	97,293	99,554
Regulatory liability:
Income tax temporary differences, net	$	62,205	62,476
Total regulatory liability in Consolidated Balance Sheets	$	62,205	62,476