Fair Value Measurement

6 Months Ended

Jun. 30, 2011

Fair Value Measurement [Abstract]

Fair Value Disclosures [Text Block]

Fair Value Measurement

The carrying amount of SJW Corp.’s cash and cash equivalents, accounts receivable and accounts payable approximates fair value as of the dates presented because of the short-term maturity of the instruments. The fair value of pension plan assets is discussed in Note 4.

The fair value of SJW Corp.’s long-term debt was approximately $390,492 and $344,105 as of June 30, 2011 and December 31, 2010, respectively, and was determined using a discounted cash flow analysis, based on the current rates for similar financial instruments of the same duration and creditworthiness of the company. The book value of the long-term debt was $345,930 and 296,837 as of June 30, 2011 and December 31, 2010, respectively.

The following table summarizes the fair value of our investment in California Water Service Group as required by FASB ASC Topic 820 – “Fair Value Measurements and Disclosures,” as of June 30, 2011 and December 31, 2010:

	Fair Value Measurements at June 30, 2011
			Quoted Prices in Active Markets for Identical Assets	Significant Observable Inputs	Significant Unobservable Inputs
	Total		(Level 1)	(Level 2)	(Level 3)
Assets:
Investment in California Water Service Group	$	7,206	7,206	—	—
	Fair Value Measurements at December 31, 2010
			Quoted Prices in Active Markets for Identical Assets	Significant Observable Inputs	Significant Unobservable Inputs
	Total		(Level 1)	(Level 2)	(Level 3)
Assets:
Investment in California Water Service Group	$	7,177	7,177	—	—