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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
Dec. 28, 2014
Dec. 29, 2013
Derivatives, Fair Value [Line Items]    
Derivative Assets, Fair Value $ 55us-gaap_DerivativeAssets $ 0us-gaap_DerivativeAssets
Derivative Liabilities, Fair Value 23us-gaap_DerivativeLiabilities 18us-gaap_DerivativeLiabilities
Foreign currency forward exchange contracts    
Derivatives, Fair Value [Line Items]    
Derivative Assets, Fair Value 55us-gaap_DerivativeAssets
/ us-gaap_DerivativeInstrumentRiskAxis
= ckp_ForeignCurrencyForwardExchangeContractsMember
0us-gaap_DerivativeAssets
/ us-gaap_DerivativeInstrumentRiskAxis
= ckp_ForeignCurrencyForwardExchangeContractsMember
Derivative Liabilities, Fair Value 23us-gaap_DerivativeLiabilities
/ us-gaap_DerivativeInstrumentRiskAxis
= ckp_ForeignCurrencyForwardExchangeContractsMember
18us-gaap_DerivativeLiabilities
/ us-gaap_DerivativeInstrumentRiskAxis
= ckp_ForeignCurrencyForwardExchangeContractsMember
Derivatives designated as hedging instruments    
Derivatives, Fair Value [Line Items]    
Derivative Assets, Fair Value 0us-gaap_DerivativeAssets
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
0us-gaap_DerivativeAssets
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
Derivative Liabilities, Fair Value 0us-gaap_DerivativeLiabilities
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
0us-gaap_DerivativeLiabilities
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
Derivatives designated as hedging instruments | Foreign currency revenue forecast contracts | Other current assets    
Derivatives, Fair Value [Line Items]    
Derivative Assets, Fair Value 0us-gaap_DerivativeAssets
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentAssetsMember
/ us-gaap_DerivativeInstrumentRiskAxis
= ckp_ForeignCurrencyRevenueForecastContractsMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
0us-gaap_DerivativeAssets
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentAssetsMember
/ us-gaap_DerivativeInstrumentRiskAxis
= ckp_ForeignCurrencyRevenueForecastContractsMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
Derivatives designated as hedging instruments | Foreign currency revenue forecast contracts | Other current liabilities    
Derivatives, Fair Value [Line Items]    
Derivative Liabilities, Fair Value 0us-gaap_DerivativeLiabilities
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentLiabilitiesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= ckp_ForeignCurrencyRevenueForecastContractsMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
0us-gaap_DerivativeLiabilities
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentLiabilitiesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= ckp_ForeignCurrencyRevenueForecastContractsMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
Derivatives not designated as hedging instruments    
Derivatives, Fair Value [Line Items]    
Derivative Assets, Fair Value 55us-gaap_DerivativeAssets
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
0us-gaap_DerivativeAssets
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
Derivative Liabilities, Fair Value 23us-gaap_DerivativeLiabilities
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
18us-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]    
Derivative Assets, Fair Value 55us-gaap_DerivativeAssets
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentAssetsMember
/ us-gaap_DerivativeInstrumentRiskAxis
= ckp_ForeignCurrencyForwardExchangeContractsMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
0us-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]    
Derivative Liabilities, Fair Value $ 23us-gaap_DerivativeLiabilities
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentLiabilitiesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= ckp_ForeignCurrencyForwardExchangeContractsMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
$ 18us-gaap_DerivativeLiabilities
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentLiabilitiesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= ckp_ForeignCurrencyForwardExchangeContractsMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember