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Stock-Based Compensation (Narrative) (Details) (USD $)
12 Months Ended 0 Months Ended 3 Months Ended 0 Months Ended 3 Months Ended 0 Months Ended
Dec. 28, 2014
Dec. 29, 2013
Dec. 30, 2012
Feb. 27, 2013
May 28, 2013
Sep. 29, 2013
Jun. 02, 2010
Apr. 29, 2004
Jun. 29, 2014
May 02, 2013
Mar. 31, 2013
Feb. 27, 2014
Apr. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Share-based compensation expense $ 5,800,000us-gaap_AllocatedShareBasedCompensationExpense $ 6,400,000us-gaap_AllocatedShareBasedCompensationExpense $ 4,700,000us-gaap_AllocatedShareBasedCompensationExpense                    
Share-based compensation expense net of tax 5,800,000us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax 6,100,000us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax 4,500,000us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax                    
Expected life (in years) 7 years 8 months 5 days 5 years 0 months 28 days 5 years 0 months 22 days                    
Reversal of share-based compensation expense   500,000ckp_AllocatedShareBasedCompensationExpenseReversal 1,100,000ckp_AllocatedShareBasedCompensationExpenseReversal                    
Unrecognized compensation cost 3,300,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized                        
Expected volatility 48.09%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate 50.79%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate 52.08%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate                    
Risk-free interest rate 1.465%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate 0.835%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate 0.75%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate                    
Expected dividend yield 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate                    
Weighted-average period over which unrecognized compensation cost will be recognized (years) 1 year 8 months 12 days                        
Total fair value of restricted stock awards 2,900,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue 4,200,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue                      
Stock Options And Awards                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Unrecognized compensation cost 1,100,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
                       
Total intrinsic value of options exercised 300,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
800,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
100,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
                   
Weighted-average period over which unrecognized compensation cost will be recognized (years) 1 year 8 months 12 days                        
Proceeds from exercise of stock option and purchase under employee stock 2,000,000us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
                       
Tax benefit from option exercise 100,000us-gaap_DeferredTaxExpenseFromStockOptionsExercised
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
300,000us-gaap_DeferredTaxExpenseFromStockOptionsExercised
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
                     
Restricted Stock Units (RSUs)                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Vesting period, years 5 years                        
Weighted-average. grant date fair value, granted (USD per share) $ 14.38us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
                       
Time-Vested Cash Unit Awards                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Deferred compensation arrangement liability, current and noncurrent 900,000us-gaap_OtherDeferredCompensationArrangementsLiabilityCurrentAndNoncurrent
/ us-gaap_AwardTypeAxis
= ckp_TimeVestedCashUnitAwardsMember
                       
Deferred compensation arrangement with individual, share-based compensation expense 1,100,000us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense
/ us-gaap_AwardTypeAxis
= ckp_TimeVestedCashUnitAwardsMember
1,200,000us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense
/ us-gaap_AwardTypeAxis
= ckp_TimeVestedCashUnitAwardsMember
1,200,000us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense
/ us-gaap_AwardTypeAxis
= ckp_TimeVestedCashUnitAwardsMember
                   
Monte Carlo Simulation RSU February 27, 2013                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Expected volatility       47.01%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ ckp_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsModelAxis
= ckp_MonteCarloSimulationRSUFebruary272013Member
                 
Risk-free interest rate       0.35%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ ckp_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsModelAxis
= ckp_MonteCarloSimulationRSUFebruary272013Member
                 
Expected dividend yield       0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
/ ckp_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsModelAxis
= ckp_MonteCarloSimulationRSUFebruary272013Member
                 
Monte Carlo Simulation RSU May 28, 2013                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Expected volatility         45.23%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ ckp_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsModelAxis
= ckp_MonteCarloSimulationRSUMay282013Member
               
Risk-free interest rate         0.41%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ ckp_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsModelAxis
= ckp_MonteCarloSimulationRSUMay282013Member
               
Expected dividend yield         0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
/ ckp_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsModelAxis
= ckp_MonteCarloSimulationRSUMay282013Member
               
Monte Carlo Simulation Cash-Based Award May 2, 2013                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Cash-based Compensation Arrangement by Cash-based Payment Award, Fair Value Assumptions, Expected Volatility Rate           38.42%ckp_CashbasedCompensationArrangementbyCashbasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ ckp_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsModelAxis
= ckp_MonteCarloSimulationCashBasedAwardMay22013Member
             
Cash-based Compensation Arrangement by Cash-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate           0.26%ckp_CashbasedCompensationArrangementbyCashbasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ ckp_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsModelAxis
= ckp_MonteCarloSimulationCashBasedAwardMay22013Member
             
Cash-based Compensation Arrangement by Cash-based Payment Award, Fair Value Assumptions, Expected Dividend Rate           0.00%ckp_CashbasedCompensationArrangementbyCashbasedPaymentAwardFairValueAssumptionsExpectedDividendRate
/ ckp_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsModelAxis
= ckp_MonteCarloSimulationCashBasedAwardMay22013Member
             
2004 Omnibus Incentive Compensation Plan                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Share reserved for future issuance             6,687,956us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
/ us-gaap_PlanNameAxis
= ckp_TwoThousandAndFourOmnibusIncentiveCompensationPlanMember
           
Share available under incentive plan 2,625,011us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_PlanNameAxis
= ckp_TwoThousandAndFourOmnibusIncentiveCompensationPlanMember
                       
Percentage of fair market value of stock as purchase price             100.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPriceOfferingDate
/ us-gaap_PlanNameAxis
= ckp_TwoThousandAndFourOmnibusIncentiveCompensationPlanMember
           
2004 Omnibus Incentive Compensation Plan | Monte Carlo Simulation Lattice Model | Stock Options And Awards                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Vesting period, years               3 years          
Expected life (in years)               10 years          
2004 Omnibus Incentive Compensation Plan | Minimum | Monte Carlo Simulation Lattice Model | Restricted Stock Units (RSUs)                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Vesting period, years               3 years          
2004 Omnibus Incentive Compensation Plan | Maximum | Monte Carlo Simulation Lattice Model | Restricted Stock Units (RSUs)                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Vesting period, years               5 years          
LTIP Second Half 2012 Plan                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Share-based compensation expense     600,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_PlanNameAxis
= ckp_LtipSecondHalf2012PlanMember
                   
Reversal of share-based compensation expense                 100,000ckp_AllocatedShareBasedCompensationExpenseReversal
/ us-gaap_PlanNameAxis
= ckp_LtipSecondHalf2012PlanMember
       
Awards vested                         74,321ckp_Awardsvested
/ us-gaap_PlanNameAxis
= ckp_LtipSecondHalf2012PlanMember
Grant date price of vested shares                         7.59ckp_Grantdatepriceofvestedshares
/ us-gaap_PlanNameAxis
= ckp_LtipSecondHalf2012PlanMember
LTIP 2013 Plan                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Share-based compensation expense 80,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_PlanNameAxis
= ckp_LTIP2013PlanMember
42,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_PlanNameAxis
= ckp_LTIP2013PlanMember
                     
Weighted-average. grant date fair value, granted (USD per share)       11.91us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= ckp_LTIP2013PlanMember
11.56us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= ckp_LTIP2013PlanMember
               
Unrecognized compensation cost 100,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ us-gaap_PlanNameAxis
= ckp_LTIP2013PlanMember
                       
Maximum RSU's outstanding achievable 26,400ckp_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsMaximumUnitsOutstandingAchievable
/ us-gaap_PlanNameAxis
= ckp_LTIP2013PlanMember
                       
May 2, 2013 Cash-Based Award                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Cash-based Compensation Arrangement by Cash-based Payment Award, Established Target Cash Amount                   400,000ckp_CashbasedCompensationArrangementbyCashbasedPaymentAwardEstablishedTargetCashAmount
/ us-gaap_PlanNameAxis
= ckp_May22013CashBasedAwardMember
     
Cash-based Compensation Arrangement by Cash-based Payment Award, Fair Value $ 0.47ckp_CashbasedCompensationArrangementbyCashbasedPaymentAwardFairValue
/ us-gaap_PlanNameAxis
= ckp_May22013CashBasedAwardMember
                       
Allocated Cash-based Compensation Expense 100,000ckp_AllocatedCashbasedCompensationExpense
/ us-gaap_PlanNameAxis
= ckp_May22013CashBasedAwardMember
                  100,000ckp_AllocatedCashbasedCompensationExpense
/ us-gaap_PlanNameAxis
= ckp_May22013CashBasedAwardMember
   
Long Term Incentive Plan, 2014 Plan [Member]                          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Share-based compensation expense 300,000us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_PlanNameAxis
= ckp_LongTermIncentivePlan2014PlanMember
                       
Weighted-average. grant date fair value, granted (USD per share)                       $ 14.90us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= ckp_LongTermIncentivePlan2014PlanMember
 
Unrecognized compensation cost $ 800,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ us-gaap_PlanNameAxis
= ckp_LongTermIncentivePlan2014PlanMember
                       
Maximum RSU's outstanding achievable 153,820ckp_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsMaximumUnitsOutstandingAchievable
/ us-gaap_PlanNameAxis
= ckp_LongTermIncentivePlan2014PlanMember