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Fair Value Measurements - Schedule of Assets and Liabilities on a Non-Recurring Basis (Details) - Tres Amigas - Fair Value, Measurements, Nonrecurring $ in Thousands	Jun. 30, 2016 USD ($)
Significant Unobservable Inputs (Level 3)
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investment in unconsolidated entity - Tres Amigas	$ 0
Reported Value Measurement
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Investment in unconsolidated entity - Tres Amigas	$ 0

X

- Definition

Fair value portion of investments accounted under the equity method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 25
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=66022186&loc=d3e32014-111567

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- Definition

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+ References

No definition available.

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