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Adjustments Resulting from Foreign Currency Translations (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Intercompany Foreign Currency Balance [Line Items] |  |  |
Amounts (credited)/charged | $ (1,233) | $ (1,231) | $ 391

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