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Retirement Plans - Additional Information (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Retirement Plans    
Noncontributory benefit pension plans covering active employees 13.00%cts_NoncontributoryPensionBenefitPlansForEmployees  
Amortization of retirement benefits, net of tax $ 6,700,000us-gaap_DefinedBenefitPlanFutureAmortizationOfGainLoss  
United States Pension Plan of US Entity, Defined Benefit [Member]    
Retirement Plans    
Curtailment loss   651,000us-gaap_DefinedBenefitPlanCurtailments
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember
Expected contribution to be made by CTS 400,000us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInNextFiscalYear
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember		  
Foreign Pension Plans [Member]    
Retirement Plans    
Expected contribution to be made by CTS $ 4,600,000us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInNextFiscalYear
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_ForeignPensionPlansDefinedBenefitMember