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Prepaid Expenses and Other Current Assets (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]    
Prepaid income taxes $ 44,631us-gaap_PrepaidExpenseCurrent $ 3,249us-gaap_PrepaidExpenseCurrent
Other prepaid expenses 37,669us-gaap_OtherPrepaidExpenseCurrent 29,498us-gaap_OtherPrepaidExpenseCurrent
Other current assets 46,681us-gaap_OtherAssetsCurrent 29,349us-gaap_OtherAssetsCurrent
Total $ 128,981us-gaap_PrepaidExpenseAndOtherAssetsCurrent $ 62,096us-gaap_PrepaidExpenseAndOtherAssetsCurrent