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Consolidated Variable Interest Entities (Balance Sheets) (Details) - Variable Interest Entity, Primary Beneficiary - USD ($) $ in Thousands | Jun. 30, 2016 | Dec. 31, 2015
--- | --- | ---
Cash and cash equivalents |  |
Variable Interest Entity [Line Items] |  |
Assets | $ 84,356 | $ 350,815
Accounts receivable |  |
Variable Interest Entity [Line Items] |  |
Assets | 15,749 | 17,131
Prepaid expenses and other |  |
Variable Interest Entity [Line Items] |  |
Assets | 2,341 | 2,111
Property, plant and equipment, net |  |
Variable Interest Entity [Line Items] |  |
Assets | 2,276,474 | 1,969,993
Other assets |  |
Variable Interest Entity [Line Items] |  |
Assets | 156,033 | 91,975
Accounts payable |  |
Variable Interest Entity [Line Items] |  |
Liabilities | 71,818 | 35,909
Credit facility borrowings |  |
Variable Interest Entity [Line Items] |  |
Liabilities | 0 | 299,000
Other current liabilities |  |
Variable Interest Entity [Line Items] |  |
Liabilities | 43,543 | 15,722
Long-term debt |  |
Variable Interest Entity [Line Items] |  |
Liabilities | 493,786 | 493,401
Other liabilities and credits |  |
Variable Interest Entity [Line Items] |  |
Liabilities | $ 9,333 | $ 7,834

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- Definition The carrying amount of the consolidated Variable Interest Entity's assets included in the reporting entity's statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (bb) -URI http://asc.fasb.org/extlink&oid=64801991&loc=d3e5710-111685 + Details
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- Definition The carrying amount of the consolidated Variable Interest Entity's liabilities included in the reporting entity's statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (bb) -URI http://asc.fasb.org/extlink&oid=64801991&loc=d3e5710-111685 + Details
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