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Income Taxes (Details 3) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Canada  
Income Taxes  
Foreign subsidiary earnings permanently reinvested to satisfy current working capital requirements $ 2,400us-gaap_UndistributedEarningsOfForeignSubsidiaries
/ us-gaap_IncomeTaxAuthorityAxis
= country_CA
Tax that may be payable on distribution of foreign subsidiary earnings to the United States 918us-gaap_DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfForeignSubsidiaries
/ us-gaap_IncomeTaxAuthorityAxis
= country_CA
Puerto Rico  
Income Taxes  
Foreign subsidiary earnings permanently reinvested to satisfy current working capital requirements 4,619us-gaap_UndistributedEarningsOfForeignSubsidiaries
/ us-gaap_IncomeTaxAuthorityAxis
= country_PR
Tax that may be payable on distribution of foreign subsidiary earnings to the United States $ 1,700us-gaap_DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfForeignSubsidiaries
/ us-gaap_IncomeTaxAuthorityAxis
= country_PR