Balancing and Memorandum Account Recovery Procedures (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Balancing and Memorandum Account Recovery Procedures [Abstract]
Balancing and Memorandum Account, Net	$ 9,336		$ 9,336
Balancing and Memorandum Accounts, Revenue and Regulatory Assets	$ 1,518	$ 1,674	$ 1,107	$ 3,559
Threshold as a percentage of authorized revenue for balancing account or memorandum account review	2.00%		2.00%