Subsequent Events (Details) (San Jose Water Company [Member], Senior Notes [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended	0 Months Ended
	Dec. 31, 2013	Jan. 24, 2014 John Hancock Life Insurance [Member] Subsequent Event [Member]
Subsequent Event [Line Items]
Debt amount		$ 50,000
Stated interest rates		5.14%
Ratio of indebtedness to total capital	0.6666	66.66
Ratio of net income available for interest charges for the trailing 12-month calendar period to interest charges	1.75	1.75