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Commitments and Contingent Liabilities (Details Narratives) (USD $)
In Thousands, unless otherwise specified
 9 Months Ended
Sep. 30, 2013
Purchase Commitment, Excluding Long-term Commitment [Line Items]  
Expected construction cost for construction program, next year $ 18,500
Liability recognized on the balance sheet for guaranty $ 400
USA-PA
  
Purchase Commitment, Excluding Long-term Commitment [Line Items]  
Term of water and wastewater systems agreement 20 years
Water and wastewater systems agreement expiration year 2018
Non-affiliated Regulated Water Utility
  
Purchase Commitment, Excluding Long-term Commitment [Line Items]  
Purchase of untreated water 3,000,000
Purchase of untreated water agreement expiration date Feb. 27, 2016
New Jersey Water Supply Authority ( NJWSA)
  
Purchase Commitment, Excluding Long-term Commitment [Line Items]  
Purchase of untreated water 27,000,000
Purchase of untreated water agreement expiration date Nov. 30, 2023