Capitalization (Tables)

9 Months Ended

Sep. 30, 2013

Capitalization, Long-term Debt and Equity [Abstract]

Schedule of carrying amount and fair value of entity's bonds

The carrying amount and fair value of the Company’s bonds were as follows:

	(Thousands of Dollars)
	September 30, 2013				December 31, 2012
	Carrying		Fair		Carrying		Fair
	Amount		Value		Amount		Value
First Mortgage Bonds	$	87,471	$	80,193	$	91,938	$	93,556
SRF Bonds	$	625	$	628	$	708	$	712