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Fair Value Measurement, Financial Instruments And Risk Management (Carrying And Fair Values Of Non-Current Financial Assets And Liabilities Not Measured At Fair Value On A Recurring Basis) (Details) (Estimated Fair Value, Senior Secured Credit Facility, USD $)
In Thousands, unless otherwise specified
Mar. 29, 2015
Dec. 28, 2014
Estimated Fair Value | Senior Secured Credit Facility
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Carrying Amount $ 65,000us-gaap_LongTermLineOfCredit
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember
/ us-gaap_LineOfCreditFacilityAxis
= ckp_SeniorSecuredCreditFacilityMember
$ 65,000us-gaap_LongTermLineOfCredit
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember
/ us-gaap_LineOfCreditFacilityAxis
= ckp_SeniorSecuredCreditFacilityMember
Estimated Fair Value $ 65,000us-gaap_LineOfCreditFacilityFairValueOfAmountOutstanding
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember
/ us-gaap_LineOfCreditFacilityAxis
= ckp_SeniorSecuredCreditFacilityMember
$ 65,000us-gaap_LineOfCreditFacilityFairValueOfAmountOutstanding
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember
/ us-gaap_LineOfCreditFacilityAxis
= ckp_SeniorSecuredCreditFacilityMember