Minimum annual payment for 3 years.

No definition available.

Name:	true_ContractualObligationMinimumAnnualPayment
Namespace Prefix:	true_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Minimum annual payment requirement which was eliminated.

+ References

No definition available.

+ Details

Name:	true_ContractualObligationMinimumAnnualPaymentRequirementEliminated
Namespace Prefix:	true_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Number of years for minimum annual payment.

+ References

No definition available.

+ Details

Name:	true_ContractualObligationTerm
Namespace Prefix:	true_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount which the parties agreed should be paid by the reporting entity for visitors to the website as of the date of termination of the contract.

+ References

No definition available.

+ Details

Name:	true_ContractualSettlement
Namespace Prefix:	true_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The period of time subsequent to the termination of the agreement over which the remaining balance of the settlement will be paid.

+ References

No definition available.

+ Details

Name:	true_ContractualSettlementInstallmentPeriod
Namespace Prefix:	true_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Portion of the settlement amount which was paid by application of the deposit to the agreed liability.

+ References

No definition available.

+ Details

Name:	true_ContractualSettlementPaidByDeposit
Namespace Prefix:	true_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Monthly reduction in stand-by letter of credit.

+ References

No definition available.

+ Details

Name:	true_LetterOfCreditMonthlyReductionAmount
Namespace Prefix:	true_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Stand-by letter of credit required once the settlement is paid.

+ References

No definition available.

+ Details

Name:	true_LetterOfCreditRequirementAfterSettlementPaid
Namespace Prefix:	true_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The carrying amount of the asset transferred to a third party to serve as a deposit, which typically serves as security against failure by the transferor to perform under terms of an agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 17

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 8

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.8,17)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DepositAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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

- Details

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Data Type:	xbrli:stringItemType
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Commitments and Contingencies (Details 2) (Yahoo Auto Buying Program, USD $) In Millions, unless otherwise specified	0 Months Ended
	Jun. 29, 2012	Oct. 11, 2011	Sep. 30, 2014	Apr. 30, 2013	Dec. 31, 2012	Jun. 29, 2012	Jan. 17, 2012	Oct. 19, 2011
Yahoo Auto Buying Program
Commitment and contingencies
Minimum annual payment for 3 years								$ 50.0
Number of years for minimum annual payment		3 years
Deposit								10.0
Stand-by letter of credit to guarantee performance	10.0		0	2.0	4.5	10.0	15.0
Minimum annual payment requirement which was eliminated	50.0					50.0
Settlement amount	20.0					20.0
Portion of settlement paid by deposit	10.0					10.0
Period over which remaining balance will be paid	9 months
Monthly reduction in stand-by letter of credit	1.1					1.1
Letter of credit required after settlement paid	$ 2.0					$ 2.0