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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) (Two Thousand Thirteen (2013) Senior Secured Credit Facility, USD $)
In Thousands, unless otherwise specified
Dec. 28, 2014
Dec. 29, 2013
Two Thousand Thirteen (2013) 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_DebtInstrumentAxis
= ckp_TwoThousandThirteen2013TwoHundredMillionVariableInterestRateRevolvingFacilityMaturingin2018Member
$ 90,000us-gaap_LongTermLineOfCredit
/ us-gaap_DebtInstrumentAxis
= ckp_TwoThousandThirteen2013TwoHundredMillionVariableInterestRateRevolvingFacilityMaturingin2018Member
Estimated Fair Value $ 65,000us-gaap_LongTermDebtFairValue
/ us-gaap_DebtInstrumentAxis
= ckp_TwoThousandThirteen2013TwoHundredMillionVariableInterestRateRevolvingFacilityMaturingin2018Member
$ 90,000us-gaap_LongTermDebtFairValue
/ us-gaap_DebtInstrumentAxis
= ckp_TwoThousandThirteen2013TwoHundredMillionVariableInterestRateRevolvingFacilityMaturingin2018Member