Acquisitions and Dispositions - Summary of Pro Forma Financial Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Business Combinations [Abstract]
Revenues	$ 521,668	$ 716,753	$ 1,080,767	$ 1,667,516
Net loss	$ (17,882)	$ (223,154)	$ (427,946)	$ (268,433)
Loss per share:
Basic	$ (0.07)	$ (0.92)	$ (1.75)	$ (1.10)
Diluted	$ (0.07)	$ (0.92)	$ (1.75)	$ (1.10)

Business acquisition pro forma earnings per share basic and diluted abstract.

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- Definition

The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(2)-(3)
-URI http://asc.fasb.org/extlink&oid=65885119&loc=d3e1392-128463

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The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

+ References

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- References

No definition available.

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