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Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Jul. 22, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Commitments and Contingencies [Line Items] |  |  |  |  |  |
Data cost incurred |  | $ 1,179 |  | $ 874 | $ 3,400 | $ 2,757
Capital commitment under non-cancellable data licensing agreements, Total |  | $ 24,321 |  |  | 24,321 |
Litigation settlement expense |  |  | $ 7,000 |  |  |
Accrued Expenses and Other Current Liabilities [Member] |  |  |  |  |  |
Commitments and Contingencies [Line Items] |  |  |  |  |  |
Litigation settlement expense |  |  |  |  | $ 5,000 |
TransUnion Risk and Alternative Data Solutions, Inc [Member] |  |  |  |  |  |
Commitments and Contingencies [Line Items] |  |  |  |  |  |
Litigation settlement, amount awarded to other party | $ 7,000 |  |  |  |  |
Loss contingency, settlement agreement, terms |  |  |  |  | Company subsidiary, IDI Holdings, LLC (“IDI Holdings”), will pay $7,000 to TRADS over the course of one year to settle all matters (the “TRADS Litigation Settlement”). |

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- Definition Capital commitment under non-cancellable data licensing agreements, net. + References No definition available. + Details
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- Definition Description of the terms of a settlement agreement which resolved the legal matter, including the nature of the consideration, timing of payment, and the nature of rights obtained or lost (for example, but not limited to, patent, trademark, copyright, license and franchise rights). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14435-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14557-108349 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349 + Details
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