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Equity Method Investments (Details) - USD ($) | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | [1]
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Schedule of Equity Method Investments [Line Items] |  |  |
Equity method investments | $ 18,472,000 |  | $ 0
Other Commitment, total projected investment for two joint ventures | $ 91.0 |  |
CP LLC [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Equity Method Investment, Ownership Percentage |  | 50.00% |
Equity Method Investment, Ownership Percentage by Other Investor |  | 50.00% |
Rangeland Rio [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Equity Method Investment, Ownership Percentage |  | 33.00% |
Equity Method Investment, Ownership Percentage by Other Investor |  | 67.00% |
[1] | Adjusted to include the historical balances of the Logistics Assets Predecessor. See Notes 1 and 2 for further discussion.

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