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Texas Water Alliance Limited Narrative (Details) $ in Thousands	Feb. 22, 2016 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Purchase and Sales Agreement, Holdback Amount	$ 3,000
Purchase and Sales Agreement, Holdback Term	4 years
Texas Water Alliance Alliance [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Sales of Business, Affiliate and Productive Assets	$ 31,000

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