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Accounting Pronouncements (Details) - USD ($) $ in Thousands | Jun. 30, 2016 | Dec. 31, 2015 | Jun. 30, 2015
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New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Current assets | $ (355,691) | $ (245,826) | $ (265,472)
Accounting Standards Update 2015-17 |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Long-term assets |  | 22,616 | 18,709
Current assets |  | $ 22,616 | $ 18,709

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