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Assets Held for Sale, Divestitures and Acquisitions Acquisitions (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions |  |  | 1 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | ---
Oct. 04, 2016 | Aug. 12, 2016 | Oct. 26, 2016 | Sep. 30, 2016 | Dec. 31, 2015
Business Acquisition [Line Items] |  |  |  |  |
Restricted Cash and Cash Equivalents, Noncurrent |  |  |  | $ 49,000 | $ 0
Stock Issued During Period, Shares, New Issues |  | 18.4 |  |  |
Common Stock, Par or Stated Value Per Share |  |  |  | $ 0.01 | $ 0.01
Rock Oil Acquisition 2016 [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Payments to Acquire Businesses, Gross |  |  |  | $ 980,000 |
Restricted Cash and Cash Equivalents, Noncurrent |  |  |  | $ 49,000 |
Subsequent Event [Member] | Rock Oil Acquisition 2016 [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Payments to Acquire Businesses, Gross | $ 991,000 |  |  |  |
Scenario, Forecast [Member] | Subsequent Event [Member] | QStar Acquisition 2016 [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Payments to Acquire Businesses, Gross |  |  | $ 1,100,000 |  |
Stock Issued During Period, Shares, New Issues |  |  | 13.4 |  |
Common Stock, Par or Stated Value Per Share |  |  | $ 0.01 |  |

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