2.4.0.841001 - Disclosure - Senior Convertible Notes (Narrative) (Details)truefalsefalse1false USDfalsefalseDuration_1_1_2013_To_6_30_2013http://www.sec.gov/CIK0001333513duration2013-01-01T00:00:002013-06-30T00:00:00Unit13Dividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170$2false USDtruefalse$As_Of_6_30_2013_us-gaap_DebtInstrumentAxis_trak_OnePointFiveZeroPercentageSeniorConvertibleNotesDueTwoThousandSeventeenMemberhttp://www.sec.gov/CIK0001333513instant2013-06-30T00:00:000001-01-01T00:00:00falsefalse1.50% Senior Convertible Notes Due 2017 [Member]us-gaap_DebtInstrumentAxisxbrldihttp://xbrl.org/2006/xbrlditrak_OnePointFiveZeroPercentageSeniorConvertibleNotesDueTwoThousandSeventeenMemberus-gaap_DebtInstrumentAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$3false USDtruefalse$As_Of_12_31_2012_us-gaap_DebtInstrumentAxis_trak_OnePointFiveZeroPercentageSeniorConvertibleNotesDueTwoThousandSeventeenMemberhttp://www.sec.gov/CIK0001333513instant2012-12-31T00:00:000001-01-01T00:00:00falsefalse1.50% Senior Convertible Notes Due 2017 [Member]us-gaap_DebtInstrumentAxisxbrldihttp://xbrl.org/2006/xbrlditrak_OnePointFiveZeroPercentageSeniorConvertibleNotesDueTwoThousandSeventeenMemberus-gaap_DebtInstrumentAxisexplicitMemberUnit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$4false USDtruefalse$As_Of_3_5_2012_us-gaap_DebtInstrumentAxis_trak_OnePointFiveZeroPercentageSeniorConvertibleNotesDueTwoThousandSeventeenMemberhttp://www.sec.gov/CIK0001333513instant2012-03-05T00:00:000001-01-01T00:00:00falsefalse1.50% Senior Convertible Notes Due 2017 [Member]us-gaap_DebtInstrumentAxisxbrldihttp://xbrl.org/2006/xbrlditrak_OnePointFiveZeroPercentageSeniorConvertibleNotesDueTwoThousandSeventeenMemberus-gaap_DebtInstrumentAxisexplicitMemberUnit14Standardhttp://www.xbrl.org/2003/instancepurexbrli0Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true 3us-gaap_DebtInstrumentLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Debt Instrument [Line Items]2false 4us-gaap_DebtInstrumentFaceAmountus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2truefalsefalse200000000200000000USD$falsetruefalse3truefalsefalse200000000200000000USD$falsetruefalse4truefalsefalse200000000200000000USD$falsetruefalsexbrli:monetaryItemTypemonetaryFace (par) amount of debt instrument at time of issuance.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400 false2Senior convertible notes issued, aggregate principal amount3false 4us-gaap_DebtInstrumentInterestRateStatedPercentageus-gaap_truenainstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsetruefalse00falsefalsefalse2falsetruefalse00falsefalsefalse3falsetruefalse00falsefalsefalse4truetruefalse0.0150.015falsefalsefalsenum:percentItemTypepureContractual interest rate for funds borrowed, under the debt agreement.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 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 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 false0Interest rate of senior convertible notes4false 4us-gaap_DebtInstrumentMaturityDateus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse002017-03-15falsefalsetrue2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:dateItemTypedateDate when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 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 210.5-02.22(a)(2)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 false0Maturity date of senior convertible notes5false 4us-gaap_DebtInstrumentConvertibleConversionPrice1us-gaap_truenainstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse37.3737.37USD$falsetruefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsenum:perShareItemTypedecimalThe price per share of the conversion feature embedded in the debt instrument.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6928298&loc=SL6031898-161870 false3Senior convertible notes, initial conversion price6false 4us-gaap_UnamortizedDebtIssuanceExpenseus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse42000004200000USD$falsetruefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThe remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 false2Issuance costs remaining to be amortized7false 4trak_DebtInstrumentConvertibleWarrantStrikePricetrak_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse46.1846.18USD$falsetruefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsenum:perShareItemTypedecimalStrike price of warrants in connection with the senior convertible notes.No definition available.false3Warrant transactions, initial strike pricefalseSenior Convertible Notes (Narrative) (Details) (USD $)NoRoundingUnKnownNoRoundingUnKnowntruefalsefalseNoteshttp://www.dealertrack.com/2010-09-30/role/DisclosureSeniorConvertibleNotesNarrativeDetails47