California Water Service Group Stock (Tables)

12 Months Ended

Dec. 31, 2013

Investments, Debt and Equity Securities [Abstract]

Fair Value, Assets Measured on Recurring Basis

The following table summarizes the fair value of the Company's investment in California Water Service Group as of December 31, 2013 and 2012:

	Balance as of December 31, 2013		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)	Significant Unobservable Inputs (Level 3)
Assets:
Investment in California Water Service Group	$	8,885	$	8,885	—	—
	Balance as of December 31, 2012		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)	Significant Unobservable Inputs (Level 3)
Assets:
Investment in California Water Service Group	$	7,067	$	7,067	—	—