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Income Taxes (Details 3) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Income Tax Disclosure [Abstract]      
The company has not recognized deferred income taxes of undistributed earnings of its international subsidiaries $ 862,082us-gaap_UndistributedEarningsOfForeignSubsidiaries    
The Company repatriated a dividend from a portion of current year foreign earnings to the U.S. in the amount of 12,500b_AmountOfCurrentYearForeignEarningsRepatriatedDuringPeriod    
Dividend increased tax expense by $ 4,391us-gaap_IncomeTaxReconciliationRepatriationOfForeignEarnings    
Dividend increased tax expense by 2.60%us-gaap_EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarnings 1.10%us-gaap_EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarnings 2.30%us-gaap_EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarnings