Basis of Presentation and Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2013
Accounting Policies [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements In February 2013, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2013-02, Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income (“ASU No. 2013-02”). Under ASU No. 2013-02, an entity is required to provide information about the amounts reclassified out of accumulated other comprehensive income by component, either on the face of the financial statement where net income is presented or in the notes thereto. ASU No. 2013-02 is effective prospectively for reporting periods beginning after December 15, 2012. ASU 2013-02 was adopted by the Company on January 1, 2013. The Company elected to present the information as a separate disclosure in the notes to the condensed consolidated financial statements. Refer to Note 9 for further discussion. In February 2013, the FASB issued ASU No. 2013-04, Obligations Resulting from Joint and Several Liability Arrangements for Which the Total Amount of the Obligation Is Fixed at the Reporting Date (“ASU No. 2013-04”). Under ASU No. 2013-04, an entity is required to measure and disclose the amounts and nature of obligations resulting from joint and several liability arrangements for which the total amount of the obligation is fixed at the reporting date. ASU No. 2013-04 is effective for fiscal years, and interim reporting periods within those years, beginning after December 15, 2013. Early adoption is permitted. The Company has elected not to early adopt this standard. The adoption of ASU 2013-04 will not have a material impact on the Company’s condensed consolidated financial statements as the long-term debt resulting from joint and several liability arrangements has been measured on a gross basis and disclosed in Note 8. Other obligations resulting from joint and several liability arrangements, such as contingencies, retirement benefits and income taxes, are excluded from the scope of this ASU. In March 2013, the FASB issued ASU No. 2013-05, Parent’s Accounting for the Cumulative Translation Adjustment upon Derecognition of Certain Subsidiaries or Groups of Assets within a Foreign Entity or of an Investment in a Foreign Entity (“ASU No. 2013-05”). Under ASU No. 2013-05, an entity is required to release any related cumulative translation adjustment into net income upon cessation to have a controlling financial interest in a subsidiary or group of assets within a foreign entity. ASU 2013-05 is effective prospectively for fiscal years, and interim reporting periods within those years, beginning after December 15, 2013. Early adoption is permitted. The Company has elected not to early adopt this standard. The adoption of ASU 2013-05 is not expected to have a material impact on the Company’s condensed consolidated financial statements. In July 2013, the FASB issued ASU No. 2013-11, Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists (“ASU No. 2013-11”). Under ASU No. 2013-11, an unrecognized tax benefit should be presented as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward, with the exception that these unrecognized tax benefits are not available at the reporting date to settle any additional income taxes that would result from the disallowance of a tax position or the tax law. An additional exception applies when the tax law does not require the entity to use, and the entity does not intend to use, the deferred tax asset for such purpose, then the unrecognized tax benefit should be presented as a liability and should not be combined with deferred tax assets. ASU No. 2013-11 is effective for fiscal years, and interim reporting periods within those years, beginning after December 15, 2013. Early adoption is permitted. The Company has elected not to early adopt this standard. The Company is currently assessing the potential impact of ASU No. 2013-11 on its financial statements.
Investments	In addition to the available-for-sale securities above, the Company has equity investments in non-public companies in which the Company acquired non-controlling interests and for which no readily determinable market value exists. These securities were accounted for under the cost method in accordance with Accounting Standards Codification (“ASC”) 323-10-25, The Equity Method of Accounting for Investments in Common Stock. At September 30, 2013 and December 31, 2012, the carrying value of such securities was $3,737 and $5,015, respectively, and has been included in “Other assets” in the accompanying condensed consolidated balance sheets.
Business Combinations	Acquisition Escrows Pursuant to the related acquisition agreements, the Company has funded various escrow accounts to satisfy pre-acquisition indemnity and tax claims arising subsequent to the acquisition dates, as well as a portion of the contingent payments. At September 30, 2013 and December 31, 2012, the current portion of the escrows amounted to $22,985 and $29,277, and the noncurrent portion of the escrow amounted to $5,000 and $26,803, respectively. The current and noncurrent portions of the escrows have been included in “Other current assets” and “Other assets” in the accompanying condensed consolidated balance sheets, respectively.
Disclosures about Segments of an Enterprise and Related Information	ASC 280-10, Disclosures About Segments of an Enterprise and Related Information (“ASC 280-10”), establishes standards for reporting information about operating segments. ASC 280-10 requires that a public business enterprise report financial and descriptive information about its reportable operating segments. Operating segments are components of an enterprise for which separate financial information is available that is evaluated regularly by the chief operating decision maker (“CODM”) in deciding how to allocate resources and in assessing performance. The Company’s Chief Executive Officer and President is identified as the CODM as defined by ASC 280-10. To align with the internal management of the Company’s business operations based on service offerings, the Company is organized into the following two operating segments, which are also the Company’s reportable segments: Decision Analytics: The Company develops solutions that its customers use to analyze the three key processes in managing risk: ‘prediction of loss’, ‘detection and prevention of fraud’ and ‘quantification of loss’. The Company’s combination of algorithms and analytic methods incorporates its proprietary data to generate solutions in each of these three categories. In most cases, the Company’s customers integrate the solutions into their models, formulas or underwriting criteria in order to predict potential loss events, ranging from hurricanes and earthquakes to unanticipated healthcare claims. The Company develops catastrophe and extreme event models and offers solutions covering natural and man-made risks, including acts of terrorism. The Company also develops solutions that allow customers to quantify costs after loss events occur. Fraud solutions include data on claim histories, analysis of mortgage applications to identify misinformation, analysis of claims to find emerging patterns of fraud, and identification of suspicious claims in the insurance, mortgage and healthcare sectors. The Company discloses revenue within this segment based on the industry vertical groupings of insurance, financial services, healthcare and specialized markets. Risk Assessment: The Company is the leading provider of statistical, actuarial and underwriting data for the U.S. P&C insurance industry. The Company’s databases include cleansed and standardized records describing premiums and losses in insurance transactions, casualty and property risk attributes for commercial buildings and their occupants and fire suppression capabilities of municipalities. The Company uses this data to create policy language and proprietary risk classifications that are industry standards and to generate prospective loss cost estimates used to price insurance policies. Effective December 31, 2012, the Company combined the statistical agency and data services and actuarial services into industry-standard insurance programs within the Risk Assessment segment. There have been no changes in reportable segments in accordance with ASC 280-10.
Related Party Disclosures	The Company considers its stockholders that own more than 5.00% of the outstanding common stock to be related parties as defined within ASC 850, Related Party Disclosures. As of September 30, 2013 and December 31, 2012, the Company had no related parties owning more than 5.00% of its common stock.

Disclosure of accounting policy for investments in financial assets, including marketable securities (debt and equity securities with readily determinable fair values), investments accounted for under the equity method and cost method, securities borrowed and loaned, and repurchase and resale agreements. For marketable securities, the disclosure may include the entity's accounting treatment for transfers between investment categories and how the fair values for such securities are determined. Also, for all investments, an entity may describe its policy for assessing, recognizing and measuring impairment of the investment.

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