Number of Active Restructuring Plans

No definition available.

Name:	cvo_NumberofActiveRestructuringPlans
Namespace Prefix:	cvo_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Restructuring and Related Cost, Number of Facilities Closed

+ References

No definition available.

+ Details

Name:	cvo_RestructuringandRelatedCostNumberofFacilitiesClosed
Namespace Prefix:	cvo_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Restructuring and Related Cost, Number of New Facilities

+ References

No definition available.

+ Details

Name:	cvo_RestructuringandRelatedCostNumberofNewFacilities
Namespace Prefix:	cvo_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_RestructuringCostAndReserveLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
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

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 SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 5
-Section P
-Subsection 3, 4

+ Details

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

- Definition

Carrying amount as of the balance sheet date of known and estimated obligations associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid in the next twelve months or in the normal operating cycle if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

+ References

Reference 1: 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 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 5
-Section P
-Subsection 4

+ Details

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

- Definition

Carrying amount as of the balance sheet date of known and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid after one year or beyond the next operating cycle, if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

+ References

+ Details

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

- Details

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

- Details

Name:	us-gaap_BusinessAcquisitionAxis=cvo_NationalEnvelopeAcquisitionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=cvo_EnvelopeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Restructuring and Other Charges (Narrative) (Details) $ in Thousands	Dec. 31, 2016 USD ($) facility restructuring_plan	Jan. 02, 2016 USD ($)	Dec. 27, 2014 USD ($)
Restructuring Cost and Reserve [Line Items]
Number of active restructuring plans (restructuring plan) \| restructuring_plan	3
Restructuring reserve	$ 20,932
Restructuring reserve, current	5,477	$ 3,198
Restructuring reserve, noncurrent	15,400
Acquisition Integration Plans [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	$ 0	$ 392	$ 1,213
National Envelope Acquisition [Member] \| Acquisition Integration Plans [Member] \| Envelope [Member]
Restructuring Cost and Reserve [Line Items]
Number of facilities closed (facility) \| facility	9
Number of new facilities (facility) \| facility	2