Fair Value Measurements - Movement in Level 3 Fair Value Measurements (Detail) - Redeemable Noncontrolling Shareholder's Interest [Member]	12 Months Ended
Dec. 31, 2015 USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	$ 0
Transfer into Level 3 - Redeemable noncontrolling shareholder interest	(152,250)
Adjustment for CCT valuation amount	(956)
Sale of interest in subsidiary	153,206
Ending Balance	$ 0

Fair value measurement with unobservable inputs reconciliation recurring basis sale of interest in subsidiary.

No definition available.

Name:	ctb_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisSaleOfInterestInSubsidiary
Namespace Prefix:	ctb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- 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

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- Definition

Amount of increase (decrease) of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Amount of transfer of financial instrument classified as an asset into (out of) level 3 of the fair value hierarchy.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

- Definition

Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

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