Regulatory Assets and Liabilities (Tables)

3 Months Ended

Mar. 31, 2015

Regulatory assets and liabilities are comprised of the following as of March 31, 2015 and December 31, 2014:



Description	March 31, 2015		December 31, 2014
Regulatory assets:
Income tax temporary differences, net	$	6,731	6,731
Postretirement pensions and other medical benefits	115,494		115,494
Balancing and memorandum accounts, net	45,569		47,061
Other, net	5,651		5,577
Total regulatory assets, net in Consolidated Balance Sheets	$	173,445	174,863
Less: current regulatory asset, net	15,996		16,853
Total regulatory assets, net, less current portion	$	157,449	158,010