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Acquisition and Divestiture Acquisition (Schedule of Purchase Price Allocation) (Details) - USD ($) $ in Thousands | Jul. 24, 2015 | Nov. 13, 2014
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Enterprise Offshore Acquisition |  |
Business Acquisition [Line Items] |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents | $ 1,087 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables | 28,783 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory | 600 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other | 3,504 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment | 1,229,807 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill | 79,416 |
Business Combination, Recognized Indentifiable Assets Acquired and Liabilities Assumes, Equity Investees | 353,841 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable | (6,464) |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities | (15,017) |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities | (163,513) |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncontrolling Interest | 6,471 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net | 1,518,515 |
Business Acquisition, Transaction Costs | $ 1,500,000 |
American Phoenix Acquisition [Member] |  |
Business Acquisition [Line Items] |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment |  | $ 125,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles |  | 32,000
Business Acquisition, Transaction Costs |  | $ 157,000

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