Provision For Restructuring (Schedule Of Restructuring Accrual Activity) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 27, 2015	Dec. 28, 2014	Dec. 29, 2013
Restructuring Reserve [Roll Forward]
Accrual at Beginning of Year	$ 6,255	$ 8,175
Charged to Earnings	11,383	8,524
Charge Reversed to Earnings	(1,371)	(2,042)
Cash Payments	(7,070)	(7,657)
Exchange Rate Changes	(533)	(745)
Accrual at End of Year	8,664	6,255	$ 8,175
Restructuring expenses	10,012	6,654	10,866
Severance And Other Employee-Related Charges
Restructuring Reserve [Roll Forward]
Severance and other employee-related charges	(1,400)	(2,000)
Profit Enhancement Plan
Restructuring Reserve [Roll Forward]
Restructuring expenses	10,100
Severance and other employee-related charges	(9,387)	(5,181)	0
Profit Enhancement Plan \| Severance And Other Employee-Related Charges
Restructuring Reserve [Roll Forward]
Accrual at Beginning of Year	4,082	0
Charged to Earnings	10,542	5,233
Charge Reversed to Earnings	(1,155)	(52)
Cash Payments	(4,972)	(770)
Exchange Rate Changes	(355)	(329)
Accrual at End of Year	8,142	4,082	0
Profit Enhancement Plan \| Other Exit Costs
Restructuring Reserve [Roll Forward]
Accrual at Beginning of Year	0	0
Charged to Earnings	677	101
Charge Reversed to Earnings	0	0
Cash Payments	(665)	(101)
Exchange Rate Changes	0	0
Accrual at End of Year	12	0	0
Global Restructuring Plan \| Severance And Other Employee-Related Charges
Restructuring Reserve [Roll Forward]
Accrual at Beginning of Year	2,050	7,901
Charged to Earnings	93	2,917
Charge Reversed to Earnings	(215)	(1,941)
Cash Payments	(1,302)	(6,434)
Exchange Rate Changes	(169)	(393)
Accrual at End of Year	457	2,050	7,901
Global Restructuring Plan \| Other Exit Costs
Restructuring Reserve [Roll Forward]
Accrual at Beginning of Year	15	66
Charged to Earnings	71	231
Charge Reversed to Earnings	0	0
Cash Payments	(86)	(285)
Exchange Rate Changes	0	3
Accrual at End of Year	0	15	66
Restructuring expenses	700	300
SG&A Restructuring Plan
Restructuring Reserve [Roll Forward]
Restructuring expenses	1
Severance and other employee-related charges	(1)	(7)	(222)
SG&A Restructuring Plan \| Severance And Other Employee-Related Charges
Restructuring Reserve [Roll Forward]
Accrual at Beginning of Year	108	208
Charged to Earnings	0	42
Charge Reversed to Earnings	(1)	(49)
Cash Payments	(45)	(67)
Exchange Rate Changes	(9)	(26)
Accrual at End of Year	$ 53	$ 108	$ 208

Restructuring Reserve, Charge Reversed to Earnings

No definition available.

Name:	ckp_RestructuringReserveChargeReversedToEarnings
Namespace Prefix:	ckp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Restructuring Reserve, Charged To Earnings

+ References

No definition available.

+ Details

Name:	ckp_RestructuringReserveChargedToEarnings
Namespace Prefix:	ckp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

+ References

+ Details

Name:	us-gaap_PaymentsForRestructuring
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 5.P.3)
-URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB TOPIC 5.P.4(b))
-URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 5
-Section P
-Subsection 3, 4

+ Details

Name:	us-gaap_RestructuringCharges
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

+ Details

Name:	us-gaap_RestructuringReserve
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

Name:	us-gaap_RestructuringReserveRollForward
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of gain (loss) from translating a restructuring reserve to the currency of the reporting entity from an amount denominated or measured in a different currency.

+ References

+ Details

Name:	us-gaap_RestructuringReserveTranslationAdjustment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB TOPIC 5.P.4(b))
-URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 5.P.3)
-URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)(10)
-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 5
-Section P
-Subsection 3, 4

+ Details

Name:	us-gaap_SeveranceCosts1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_RestructuringCostAndReserveAxis=us-gaap_EmployeeSeveranceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RestructuringPlanAxis=ckp_ProfitEnhancementPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RestructuringCostAndReserveAxis=ckp_OtherExitCostsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RestructuringPlanAxis=ckp_GlobalRestructuringPlanIncludingLeanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RestructuringPlanAxis=ckp_SellingGeneralAndAdministrationRestructuringPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: