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Equity Method Investments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015	Mar. 31, 2015
Schedule of Equity Method Investments [Line Items]
Investment in joint ventures	$ 94,638		$ 94,638		$ 40,678
Joint Ventures [Member]
Schedule of Equity Method Investments [Line Items]
Current assets	18,721		18,721		11,705
Noncurrent assets	212,463		212,463		87,467
Current liabilities	3,392		3,392		4,797
Noncurrent liabilities	0		0		$ 0
Revenues	226	$ 0	229	$ 0
Gross profit	226	0	229	0
Net loss	$ (1,538)	$ (880)	$ (2,857)	$ (1,332)
CP LLC [Member]
Schedule of Equity Method Investments [Line Items]
Ownership interest						50.00%
Ownership interest of co-venturer						50.00%
Rangeland Rio [Member]
Schedule of Equity Method Investments [Line Items]
Ownership interest						33.00%
Ownership interest of co-venturer						67.00%

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- Definition

The percentage of ownership of common stock or equity participation in the investee held by other investor accounted for under the equity method of accounting.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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The amount of noncurrent assets reported by an equity method investment of the entity.

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