Acquisitions (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Acquisitions [Abstract]
Purchase price	$ 0	$ 271
Water Assets of Lincoln Estates Mobile Home Park [Member]
Acquisitions [Abstract]
Date of agreement	Nov. 20, 2014
Effective date of acquisition	Nov. 24, 2014
Number of customers acquired	200
Purchase price	70
Acquisition adjustment	$ 77