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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 Subsidiary | Dec. 31, 2012 | Dec. 31, 2011
Utility Subsidiary Accounting [Abstract] |  |  |
Number of wholly owned subsidiaries | 5 |  |
Utility Plant [Abstract] |  |  |
Deferred credits and other liabilities | $ 63,058 | $ 60,990 |
Capitalized rate of AFUDC (in hundredths) | 8.20% | 8.20% | 8.20%
Summary of utility plant comprises [Abstract] |  |  |
Utility plant, gross | 468,398 | 450,037 |
Less - accumulated depreciation | 89,438 | 83,474 |
Utility plant, net | 378,960 | 366,563 |
Depreciation and Amortization [Abstract] |  |  |
Depreciation rates of water utility plant (in hundredths) | 2.30% | 2.29% | 2.22%
Minimum [Member] |  |  |
Depreciation and Amortization [Abstract] |  |  |
Amortization period of other deferred assets | 2 years |  |
Maximum [Member] |  |  |
Depreciation and Amortization [Abstract] |  |  |
Amortization period of other deferred assets | 40 years |  |
Property Held for Future Use [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Estimated useful life | 0 years |  |
Utility plant, gross | 14,865 | 14,525 |
Construction in Progress [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Estimated useful life | 0 years |  |
Utility plant, gross | 5,793 | 6,198 |
Utility plant in service-Water [Member] | Mains [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Estimated useful life | 81 years |  |
Utility plant, gross | 205,759 | 195,671 |
Utility plant in service-Water [Member] | Services [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Estimated useful life | 39 years |  |
Utility plant, gross | 32,912 | 31,627 |
Utility plant in service-Water [Member] | Storage Tanks [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Estimated useful life | 76 years |  |
Utility plant, gross | 23,895 | 23,814 |
Utility plant in service-Water [Member] | Meters [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Estimated useful life | 26 years |  |
Utility plant, gross | 21,585 | 20,652 |
Utility plant in service-Water [Member] | Hydrants [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Estimated useful life | 60 years |  |
Utility plant, gross | 10,964 | 10,505 |
Utility plant in service-Water [Member] | Intangible plant [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Estimated useful life | 0 years |  |
Utility plant, gross | 140 | 140 |
Utility plant in service-Water [Member] | Source of supply plant [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Utility plant, gross | 17,778 | 17,663 |
Utility plant in service-Water [Member] | Source of supply plant [Member] | Minimum [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Estimated useful life | 45 years |  |
Utility plant in service-Water [Member] | Source of supply plant [Member] | Maximum [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Estimated useful life | 85 years |  |
Utility plant in service-Water [Member] | Pumping and water treatment plant [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Utility plant, gross | 65,089 | 64,200 |
Utility plant in service-Water [Member] | Pumping and water treatment plant [Member] | Minimum [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Estimated useful life | 8 years |  |
Utility plant in service-Water [Member] | Pumping and water treatment plant [Member] | Maximum [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Estimated useful life | 62 years |  |
Utility plant in service-Water [Member] | General plant [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Utility plant, gross | 49,593 | 46,520 |
Utility plant in service-Water [Member] | General plant [Member] | Minimum [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Estimated useful life | 3 years |  |
Utility plant in service-Water [Member] | General plant [Member] | Maximum [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Estimated useful life | 31 years |  |
Utility plant in service-Wastewater [Member] | General plant [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Utility plant, gross | 860 | 783 |
Utility plant in service-Wastewater [Member] | General plant [Member] | Minimum [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Estimated useful life | 3 years |  |
Utility plant in service-Wastewater [Member] | General plant [Member] | Maximum [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Estimated useful life | 31 years |  |
Utility plant in service-Wastewater [Member] | Treatment and Disposal Plant [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Utility plant, gross | 12,420 | 11,708 |
Utility plant in service-Wastewater [Member] | Treatment and Disposal Plant [Member] | Minimum [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Estimated useful life | 35 years |  |
Utility plant in service-Wastewater [Member] | Treatment and Disposal Plant [Member] | Maximum [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Estimated useful life | 62 years |  |
Utility plant in service-Wastewater [Member] | Collection Mains & Lift Stations [Member] |  |  |
Summary of utility plant comprises [Abstract] |  |  |
Estimated useful life | 81 years |  |
Utility plant, gross | $ 6,745 | $ 6,031 |

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