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Fair Value Measurement, Financial Instruments And Risk Management (Fair Values Of Derivative Instruments Included Within The Consolidated Balance Sheets) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 29, 2015
Dec. 28, 2014
Derivatives, Fair Value [Line Items]    
Asset Derivatives $ 322us-gaap_DerivativeAssets $ 55us-gaap_DerivativeAssets
Liability Derivatives 0us-gaap_DerivativeLiabilities 23us-gaap_DerivativeLiabilities
Foreign currency forward exchange contracts    
Derivatives, Fair Value [Line Items]    
Asset Derivatives 322us-gaap_DerivativeAssets
/ us-gaap_DerivativeInstrumentRiskAxis
= ckp_ForeignCurrencyForwardExchangeContractsMember
55us-gaap_DerivativeAssets
/ us-gaap_DerivativeInstrumentRiskAxis
= ckp_ForeignCurrencyForwardExchangeContractsMember
Liability Derivatives 0us-gaap_DerivativeLiabilities
/ us-gaap_DerivativeInstrumentRiskAxis
= ckp_ForeignCurrencyForwardExchangeContractsMember
23us-gaap_DerivativeLiabilities
/ us-gaap_DerivativeInstrumentRiskAxis
= ckp_ForeignCurrencyForwardExchangeContractsMember
Derivatives not designated as hedging instruments:    
Derivatives, Fair Value [Line Items]    
Asset Derivatives 322us-gaap_DerivativeAssets
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
55us-gaap_DerivativeAssets
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
Liability Derivatives 0us-gaap_DerivativeLiabilities
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
23us-gaap_DerivativeLiabilities
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
Derivatives not designated as hedging instruments: | Foreign currency forward exchange contracts | Other current assets    
Derivatives, Fair Value [Line Items]    
Asset Derivatives 322us-gaap_DerivativeAssets
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentAssetsMember
/ us-gaap_DerivativeInstrumentRiskAxis
= ckp_ForeignCurrencyForwardExchangeContractsMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
55us-gaap_DerivativeAssets
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentAssetsMember
/ us-gaap_DerivativeInstrumentRiskAxis
= ckp_ForeignCurrencyForwardExchangeContractsMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
Derivatives not designated as hedging instruments: | Foreign currency forward exchange contracts | Other current liabilities    
Derivatives, Fair Value [Line Items]    
Liability Derivatives $ 0us-gaap_DerivativeLiabilities
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentLiabilitiesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= ckp_ForeignCurrencyForwardExchangeContractsMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
$ 23us-gaap_DerivativeLiabilities
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentLiabilitiesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= ckp_ForeignCurrencyForwardExchangeContractsMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember