Name:	ccmp_CompanySMatchingContributionOnParticipantsNextTwoPercentContribution
Namespace Prefix:	ccmp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Maximum percentage of eligible compensation participants may contribute to the qualified defined contribution plan.

No definition available.

Name:	ccmp_MaximumParticipantsContributionsAsPercentageOfTheirEligibleCompensation
Namespace Prefix:	ccmp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Refers to the percentage of company's contribution vested at the time of contribution.

No definition available.

Name:	ccmp_PercentageOfCompanySContributionVestedAtTimeOfContribution
Namespace Prefix:	ccmp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Percentage of participant's contribution to the qualified defined contribution plan subject to company's fifty percent matching contribution.

No definition available.

Name:	ccmp_PercentageOfParticipantSContributionSubjectToCompanySFiftyPercentMatchingContribution
Namespace Prefix:	ccmp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- References

No definition available.

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

Amount of cost for defined contribution plan.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942

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

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

No definition available.

Name:	us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Percentage employer matches of the employee's percentage contribution matched.

No definition available.