Acquisitions (Details) (USD $) In Thousands, unless otherwise specified	1 Months Ended		3 Months Ended	1 Months Ended
	Dec. 31, 2014 customer	Aug. 31, 2014	Mar. 31, 2015	Sep. 30, 2014 customer	May 31, 2014 customer	Mar. 31, 2014 customer
Lake Mohawk and Lake Tomahawk [Member]
Business Acquisition [Line Items]
Number of customers	1,250
Cash Paid	$ 1,770
Non-Regulated [Member]
Business Acquisition [Line Items]
Total purchase price	1,800	3,010
Cash Paid			700
Contingent consideration		810
Contingent consitderation term		3 years
H2O,Inc.[Member]
Business Acquisition [Line Items]
Number of customers				1,100
Cash Paid				2,796
Lake Caroline [Member]
Business Acquisition [Line Items]
Number of customers				1,040
Cash Paid				1,377
North Maine Utilities [Member]
Business Acquisition [Line Items]
Number of customers					7,200
Cash Paid					22,000
Penn Township [Member]
Business Acquisition [Line Items]
Number of customers						800
Cash Paid						$ 3,668