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Commitments and Contingent Liabilities (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Commitments And Contingent Liabilities Details
Treated	$ 775	$ 652	$ 1,494	$ 1,292
Untreated	516	516	1,128	1,122
Total Costs	$ 1,291	$ 1,168	$ 2,622	$ 2,414

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- Details

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X

- Definition

Represents cost of purchase of treated water.

+ References

No definition available.

+ Details

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- Definition

Represents cost of purchase of untreated water.

+ References

No definition available.

+ Details

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- Definition

Cost of water purchased, may include any water related assessment. If water is bought on a unit volume basis, would also be considered as commodity costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.2)

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

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