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Rate Matters (Details Narrative) (USD $)
In Thousands, unless otherwise specified
 1 Months Ended
Sep. 30, 2012
Middlesex
Jul. 31, 2012
Middlesex
Aug. 31, 2012
Pinelands Water
Aug. 31, 2012
Pinelands Wastewater
Jun. 30, 2012
Tidewater
Jun. 30, 2012
TESI
Regulatory Liabilities [Line Items]            
Description of application request seeking increase in base rates Middlesex filed an application with the New Jersey Board of Public Utilities (NJBPU) seeking permission to establish a Purchased Water Adjustment Clause and implement a tariff rate sufficient to recover increased costs of $0.1 million to purchase untreated water from the New Jersey Water Supply Authority and treated water from a non-affiliated regulated water utility. Middlesex filed an application with the New Jersey Board of Public Utilities (NJBPU) seeking permission to increase its base rates by approximately $11.3 million per year Pinelands Water and Pinelands Wastewater filed applications with the NJBPU seeking permission to increase base rates by approximately $0.2 million and $0.1 million per year, respectively. These requests were made as a result of capital investments Pinelands Water and New Pinelands Wastewater have made, or have committed to make, as well as increased operations and maintenance costs for both companies. Pinelands Water and Pinelands Wastewater filed applications with the NJBPU seeking permission to increase base rates by approximately $0.2 million and $0.1 million per year, respectively. These requests were made as a result of capital investments Pinelands Water and New Pinelands Wastewater have made, or have committed to make, as well as increased operations and maintenance costs for both companies. Tidewater filed an application with the Delaware Public Service Commission (DEPSC) seeking permission to increase its base rates by approximately $6.9 million per year TESI filed an application with the DEPSC seeking permission to increase its base rates by approximately $0.8 million per year
Increase in base rates revenue per year   $ 8,100     $ 3,900 $ 600
Originally filed base water rate increase 100 11,300 200 100 6,900 800
Return on invested capital, rate base   202,400        
Return on equity   10.15%        
Interim rates         2,500 100
Final base rates         $ 1,400