Additional area of real estate property leased.

No definition available.

Name:	true_AdditionalAreaOfRealEstatePropertyLeased
Namespace Prefix:	true_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

The liability, including both the current and noncurrent portion, associated with the construction in progress costs for the Company's build to suit lease.

+ References

No definition available.

+ Details

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

- Definition

Represents the useful life of the lease property, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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

- Definition

Represents the number of lease extension periods.

+ References

No definition available.

+ Details

Name:	true_LeaseTermNumberOfExtensionPeriods
Namespace Prefix:	true_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the minimum amount of annual reduction under the line of credit facility.

+ References

No definition available.

+ Details

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

- Definition

Area of a real estate property.

+ References

No definition available.

+ Details

Name:	us-gaap_AreaOfRealEstateProperty
Namespace Prefix:	us-gaap_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

Term of the lessee's leasing arrangement renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_LesseeLeasingArrangementsOperatingLeasesRenewalTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Term of the lessee's leasing arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_LesseeLeasingArrangementsOperatingLeasesTermOfContract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- 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

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

- Definition

Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717

+ Details

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

- Definition

Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.

+ References

No definition available.

+ Details

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

- Definition

Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.13)

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

+ Details

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

- Details

Name:	us-gaap_LeaseArrangementTypeAxis=true_OfficeLeaseLosAngelesCaliforniaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LeaseArrangementTypeAxis=true_OfficeLeaseOneSantaMonicaCaliforniaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LeaseArrangementTypeAxis=true_OfficeLeaseTwoSantaMonicaCaliforniaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LeaseArrangementTypeAxis=true_SanFranciscoOfficeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LeaseArrangementTypeAxis=true_SantaMonicaOfficeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=true_CapitalizedFacilityLeaseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Commitments and Contingencies (Details) (USD $)	3 Months Ended		1 Months Ended
Commitments and Contingencies (Details) (USD $)	Mar. 31, 2015	Mar. 31, 2014	May 31, 2014	Jul. 31, 2014	Feb. 28, 2015 sqft	Dec. 31, 2014
Rent expense and other operating lease disclosures
Rent expense	$ 1,000,000us-gaap_OperatingLeasesRentExpenseNet	$ 600,000us-gaap_OperatingLeasesRentExpenseNet
Property and equipment, gross	78,343,000us-gaap_PropertyPlantAndEquipmentGross					50,655,000us-gaap_PropertyPlantAndEquipmentGross
San Francisco Office
Rent expense and other operating lease disclosures
Lease term			10 years
Irrevocable stand-by letter of credit			800,000
Lease financing obligation	6,400,000					6,600,000
San Francisco Office \| Debt Redemption Period August 2017 to August 2020
Rent expense and other operating lease disclosures
Letter of credit that is subject to annual reduction			200,000
San Francisco Office \| Office Lease Obligations
Rent expense and other operating lease disclosures
Total minimum lease payments			7,000,000
Santa Monica Office
Rent expense and other operating lease disclosures
Lease term				15 years
Irrevocable stand-by letter of credit				3,500,000
Lease financing obligation	21,900,000
Santa Monica Office \| October, 2019 to October, 2025
Rent expense and other operating lease disclosures
Letter of credit that is subject to annual reduction				1,200,000
Santa Monica Office \| Office Lease Obligations
Rent expense and other operating lease disclosures
Total minimum lease payments				36,000,000
Office Lease One, Santa Monica, California
Rent expense and other operating lease disclosures
Irrevocable stand-by letter of credit					500,000
Area of office building leased					17,000
Optional lease extension term					5 years
Office Lease One, Santa Monica, California \| Scenario Forecast
Rent expense and other operating lease disclosures
Additional area leased					21,000
Office Lease One, Santa Monica, California \| Office Lease Obligations \| Scenario Forecast
Rent expense and other operating lease disclosures
Total minimum lease payments					26,000,000
Office Lease, Los Angeles
Rent expense and other operating lease disclosures
Lease term					5 years
Area of office building leased					6,000
Number of lease extension periods					2
Optional lease extension term					5 years
Office Lease, Los Angeles \| Office Lease Obligations
Rent expense and other operating lease disclosures
Total minimum lease payments					3,000,000
Office Lease Two, Santa Monica, California
Rent expense and other operating lease disclosures
Area of office building leased					5,000
Office Lease Two, Santa Monica, California \| Scenario Forecast
Rent expense and other operating lease disclosures
Additional area leased					7,000
Office Lease Two, Santa Monica, California \| Office Lease Obligations \| Scenario Forecast
Rent expense and other operating lease disclosures
Total minimum lease payments					3,600,000
Capitalized facility leases
Rent expense and other operating lease disclosures
Property and equipment, gross	29,256,000					6,599,000
Lease financing obligation	28,300,000					6,600,000
Capitalized facility leases \| San Francisco Office
Rent expense and other operating lease disclosures
Property and equipment, gross	7,100,000					6,600,000
Lease property, useful life			40 years
Capitalized facility leases \| Santa Monica Office
Rent expense and other operating lease disclosures
Property and equipment, gross	$ 22,200,000
Lease property, useful life				40 years