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Estimated Amortization Expense (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]    
2015 $ 10,787us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths  
2016 9,838us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo  
2017 8,930us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree  
2018 6,945us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour  
2019 4,941us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive  
Thereafter 12,774us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive  
Amortizable intangible assets, net carrying amount 54,215us-gaap_FiniteLivedIntangibleAssetsNet 52,266us-gaap_FiniteLivedIntangibleAssetsNet
Cost of Sales    
Finite-Lived Intangible Assets [Line Items]    
2015 4,255us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
 
2016 3,143us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
 
2017 2,868us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
 
2018 1,434us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
 
2019 1,207us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
 
Thereafter 3,336us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
 
Amortizable intangible assets, net carrying amount 16,243us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
 
Operating Expense    
Finite-Lived Intangible Assets [Line Items]    
2015 6,532us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_OperatingExpenseMember
 
2016 6,695us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_OperatingExpenseMember
 
2017 6,062us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_OperatingExpenseMember
 
2018 5,511us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_OperatingExpenseMember
 
2019 3,734us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_OperatingExpenseMember
 
Thereafter 9,438us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_OperatingExpenseMember
 
Amortizable intangible assets, net carrying amount $ 37,972us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_OperatingExpenseMember