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Consolidated Variable Interest Entities - Balance Sheets (Details) - Variable Interest Entity, Primary Beneficiary - USD ($) $ in Thousands | Mar. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Cash and cash equivalents |  |
Variable Interest Entity [Line Items] |  |
Assets | $ 42,768 | $ 60,453
Accounts receivable |  |
Variable Interest Entity [Line Items] |  |
Assets | 21,630 | 20,662
Prepaid expenses and other |  |
Variable Interest Entity [Line Items] |  |
Assets | 1,582 | 5,745
Property, plant and equipment, net |  |
Variable Interest Entity [Line Items] |  |
Assets | 2,632,465 | 2,578,834
Other assets |  |
Variable Interest Entity [Line Items] |  |
Assets | 258,779 | 206,104
Accounts payable |  |
Variable Interest Entity [Line Items] |  |
Liabilities | 43,531 | 35,831
Other current liabilities |  |
Variable Interest Entity [Line Items] |  |
Liabilities | 61,807 | 32,242
Long-term debt |  |
Variable Interest Entity [Line Items] |  |
Liabilities | 986,137 | 985,732
Other liabilities and credits |  |
Variable Interest Entity [Line Items] |  |
Liabilities | $ 10,258 | $ 9,562

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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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