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Supplemental financial statement info Components of Prepaid and Other Current Assets (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Prepaid and other assets $ 15,051 $ 16,956
Income/withholding tax receivable – current 11,437 14,327
VAT receivable 5,648 3,692
Derivative assets 140 0
Prepaid and other current assets $ 32,276 $ 34,975