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Summary of Significant Accounting Policies (Assets, Liabilities and Net Assets of Company's Venezuelan Subsidiaries) (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2016 | Mar. 31, 2015 | Dec. 31, 2015
Significant Accounting Policies [Line Items] |  |  |
Net Revenues | $ 157,630 | $ 148,103 |
Assets | 1,083,469 |  | $ 1,003,606
Liabilities | (730,403) |  | (664,148)
Venezuelan Operations [Member] |  |  |
Significant Accounting Policies [Line Items] |  |  |
Net Revenues | 12,105 | $ 13,955 |
Assets | 71,974 |  | 65,407
Liabilities | (39,781) |  | (36,266)
Net Assets | $ 32,193 |  | $ 29,141

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