Name:	cbm_ContractWithCustomerAsset
Namespace Prefix:	cbm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Contract with customer asset currency impact adjustment to revenue change in estimate of transaction price.

No definition available.

Name:	cbm_ContractWithCustomerAssetCurrencyImpactAdjustmentToRevenueChangeInEstimateOfTransactionPrice
Namespace Prefix:	cbm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Contract with customer asset, performance obligation satisfied, revenue recognized.

No definition available.

Name:	cbm_ContractWithCustomerAssetPerformanceObligationSatisfiedRevenueRecognized
Namespace Prefix:	cbm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- References

No definition available.

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

Amount of increase (decrease) in right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time, from business combination.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130551-203045

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

Amount of decrease in right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time from transfer to receivable due to right to consideration becoming unconditional.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130551-203045