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Basis of Presentation - Reclassifications (Details) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2014 USD ($) | Jun. 30, 2015 USD ($) segment | Jun. 30, 2014 USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Number of reportable segments | segment |  | 4 |
Water assets sales price | $ 312,000 | $ 10,165,000 | $ 7,703,000
Cost of purchased water | 135,000 | $ 5,483,000 | 4,524,000
Mineral resources expenses |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Prior year amortization reclassification adjustment | (676,000) |  |
Corporate expenses |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Prior year amortization reclassification adjustment | 338,000 |  |
Hay Sales, Centennial Operations |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Prior year amortization reclassification adjustment | (138,000) |  | (404,000)
Hay Sales, Centennial Operations | Cost of Sales |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |
Prior year amortization reclassification adjustment | $ (191,000) |  | $ (422,000)

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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=26872669&loc=d3e20235-122688 + Details
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