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Commitments and Contingencies (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 USD ($) Contracts
Commitments and Contingencies Disclosure [Abstract] |
Development Contracts with Third Parties, Number | Contracts | 0
credit facility 2015 [Member] | Line of Credit [Member] |
Other Commitments [Line Items] |
Letters of Credit Outstanding, Amount | $ | $ 15,474

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