2.2.0.25falsefalse0204 - Disclosure - Fair Value Measurementstruefalsefalse1falsefalseUSDfalsefalse1/1/2011 - 3/31/2011 USD ($) USD ($) / shares $FROM_Jan01_2011_TO_Mar31_2011http://www.sec.gov/CIK0001265888duration2011-01-01T00:00:002011-03-31T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170SharesStandardhttp://www.xbrl.org/2003/instancesharesxbrli0EPSDividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0USDUSD$2true0us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseFair Value Measurements [Abstract]3false0us-gaap_FairValueMeasurementInputsDisclosureTextBlockus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsefalsefalse004. FAIR VALUE MEASUREMENTSFair value is the price that would be received in the sale of asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The Fair Value Measurements and Disclosure Topic of FASB ASC establishes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value and requires that assets and liabilities carried at fair value be classified and disclosed in one of the following three categories:<ul><li style="margin-left:36px;list-style:disc;">Level 1. Observable inputs, such as quoted prices in active markets;</li><li style="margin-left:36px;list-style:disc;">Level 2. Inputs, other than quoted prices in active markets, that are observable either directly or indirectly; and </li><li style="margin-left:36px;list-style:disc;">Level 3. Unobservable inputs for which there is little or no market data, which require the reporting entity to develop its own assumptions.</li></ul>The Company evaluates assets and liabilities subject to fair value measurements on a recurring and non-recurring basis to determine the appropriate level at which to classify them for each reporting period. This determination requires the Company to make significant judgments.The following table sets forth, as of December 31, 2010 and March 31, 2011, the Company's financial and non-financial assets and liabilities that are measured at fair value on a recurring basis, by level within the fair value hierarchy (in thousands):<div><table style="border-collapse:collapse;margin-top:20px;"><tr style="height: 16px"><td style="width: 6px; text-align:left;border-color:#000000;min-width:6px;"> </td><td style="width: 6px; text-align:center;border-color:#000000;min-width:6px;"> </td><td style="width: 270px; text-align:center;border-color:#000000;min-width:270px;"> </td><td style="width: 25px; text-align:center;border-color:#000000;min-width:25px;"> </td><td colspan="7" style="width: 330px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:330px;">December 31, 2010</td></tr><tr style="height: 16px"><td style="width: 6px; text-align:center;border-color:#000000;min-width:6px;"> </td><td style="width: 6px; text-align:center;border-color:#000000;min-width:6px;"> </td><td style="width: 270px; text-align:center;border-color:#000000;min-width:270px;"> </td><td style="width: 25px; text-align:center;border-color:#000000;min-width:25px;"> </td><td style="width: 64px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:64px;">Level 1</td><td style="width: 24px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:24px;"> </td><td style="width: 64px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:64px;">Level 2</td><td style="width: 25px; border-top-style:solid;border-top-width:1px;text-align:right;border-color:#000000;min-width:25px;"> </td><td style="width: 64px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:64px;">Level 3</td><td style="width: 25px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:25px;"> </td><td style="width: 64px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:64px;">Total</td></tr><tr style="height: 16px"><td colspan="3" style="width: 282px; text-align:left;border-color:#000000;min-width:282px;">Municipal bonds (maturities less than one year)</td><td style="width: 25px; text-align:right;border-color:#000000;min-width:25px;">$</td><td style="width: 64px; border-top-style:solid;border-top-width:1px;text-align:right;border-color:#000000;min-width:64px;"> 13,802</td><td style="width: 24px; text-align:right;border-color:#000000;min-width:24px;">$</td><td style="width: 64px; border-top-style:solid;border-top-width:1px;text-align:right;border-color:#000000;min-width:64px;"> -</td><td style="width: 25px; text-align:right;border-color:#000000;min-width:25px;">$</td><td style="width: 64px; border-top-style:solid;border-top-width:1px;text-align:right;border-color:#000000;min-width:64px;"> -</td><td style="width: 25px; text-align:right;border-color:#000000;min-width:25px;">$</td><td style="width: 64px; border-top-style:solid;border-top-width:1px;text-align:right;border-color:#000000;min-width:64px;"> 13,802</td></tr><tr style="height: 16px"><td colspan="3" style="width: 282px; text-align:left;border-color:#000000;min-width:282px;">Municipal bonds (maturities one to three years)</td><td style="width: 25px; text-align:right;border-color:#000000;min-width:25px;">$</td><td style="width: 64px; text-align:right;border-color:#000000;min-width:64px;"> 37,009</td><td style="width: 24px; text-align:right;border-color:#000000;min-width:24px;">$</td><td style="width: 64px; text-align:right;border-color:#000000;min-width:64px;"> -</td><td style="width: 25px; text-align:right;border-color:#000000;min-width:25px;">$</td><td style="width: 64px; text-align:right;border-color:#000000;min-width:64px;"> -</td><td style="width: 25px; text-align:right;border-color:#000000;min-width:25px;">$</td><td style="width: 64px; text-align:right;border-color:#000000;min-width:64px;"> 37,009</td></tr><tr style="height: 16px"><td colspan="3" style="width: 282px; text-align:left;border-color:#000000;min-width:282px;">Marketable securities(1)</td><td style="width: 25px; text-align:right;border-color:#000000;min-width:25px;">$</td><td style="width: 64px; text-align:right;border-color:#000000;min-width:64px;"> 3,681</td><td style="width: 24px; text-align:right;border-color:#000000;min-width:24px;">$</td><td style="width: 64px; text-align:right;border-color:#000000;min-width:64px;"> -</td><td style="width: 25px; text-align:right;border-color:#000000;min-width:25px;">$</td><td style="width: 64px; text-align:right;border-color:#000000;min-width:64px;"> -</td><td style="width: 25px; text-align:right;border-color:#000000;min-width:25px;">$</td><td style="width: 64px; text-align:right;border-color:#000000;min-width:64px;"> 3,681</td></tr><tr style="height: 16px"><td colspan="3" style="width: 282px; text-align:left;border-color:#000000;min-width:282px;">Deferred compensation(2)</td><td style="width: 25px; text-align:right;border-color:#000000;min-width:25px;">$</td><td style="width: 64px; text-align:right;border-color:#000000;min-width:64px;"> 3,621</td><td style="width: 24px; text-align:right;border-color:#000000;min-width:24px;">$</td><td style="width: 64px; text-align:right;border-color:#000000;min-width:64px;"> -</td><td style="width: 25px; text-align:right;border-color:#000000;min-width:25px;">$</td><td style="width: 64px; text-align:right;border-color:#000000;min-width:64px;"> -</td><td style="width: 25px; text-align:right;border-color:#000000;min-width:25px;">$</td><td style="width: 64px; text-align:right;border-color:#000000;min-width:64px;"> 3,621</td></tr><tr style="height: 16px"><td style="width: 6px; text-align:left;border-color:#000000;min-width:6px;"> </td><td style="width: 6px; text-align:left;border-color:#000000;min-width:6px;"> </td><td style="width: 270px; text-align:left;border-color:#000000;min-width:270px;"> </td><td style="width: 25px; text-align:left;border-color:#000000;min-width:25px;"> </td><td style="width: 64px; text-align:left;border-color:#000000;min-width:64px;"> </td><td style="width: 24px; text-align:left;border-color:#000000;min-width:24px;"> </td><td style="width: 64px; text-align:left;border-color:#000000;min-width:64px;"> </td><td style="width: 25px; text-align:left;border-color:#000000;min-width:25px;"> </td><td style="width: 64px; text-align:left;border-color:#000000;min-width:64px;"> </td><td style="width: 25px; text-align:left;border-color:#000000;min-width:25px;"> </td><td style="width: 64px; text-align:left;border-color:#000000;min-width:64px;"> </td></tr><tr style="height: 16px"><td style="width: 6px; text-align:left;border-color:#000000;min-width:6px;"> </td><td style="width: 6px; text-align:center;border-color:#000000;min-width:6px;"> </td><td style="width: 270px; text-align:center;border-color:#000000;min-width:270px;"> </td><td style="width: 25px; text-align:center;border-color:#000000;min-width:25px;"> </td><td colspan="7" style="width: 330px; border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:330px;">March 31, 2011</td></tr><tr style="height: 16px"><td style="width: 6px; text-align:center;border-color:#000000;min-width:6px;"> </td><td style="width: 6px; text-align:center;border-color:#000000;min-width:6px;"> </td><td style="width: 270px; text-align:center;border-color:#000000;min-width:270px;"> </td><td style="width: 25px; text-align:center;border-color:#000000;min-width:25px;"> </td><td style="width: 64px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:64px;">Level 1</td><td style="width: 24px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:24px;"> </td><td style="width: 64px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:64px;">Level 2</td><td style="width: 25px; border-top-style:solid;border-top-width:1px;text-align:right;border-color:#000000;min-width:25px;"> </td><td style="width: 64px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:64px;">Level 3</td><td style="width: 25px; border-top-style:solid;border-top-width:1px;text-align:center;border-color:#000000;min-width:25px;"> </td><td style="width: 64px; border-top-style:solid;border-top-width:1px;border-bottom-style:solid;border-bottom-width:1px;text-align:center;border-color:#000000;min-width:64px;">Total</td></tr><tr style="height: 16px"><td colspan="3" style="width: 282px; text-align:left;border-color:#000000;min-width:282px;">Municipal bonds (maturities less than one year)</td><td style="width: 25px; text-align:right;border-color:#000000;min-width:25px;">$</td><td style="width: 64px; border-top-style:solid;border-top-width:1px;text-align:right;border-color:#000000;min-width:64px;"> 29,536</td><td style="width: 24px; text-align:right;border-color:#000000;min-width:24px;">$</td><td style="width: 64px; border-top-style:solid;border-top-width:1px;text-align:right;border-color:#000000;min-width:64px;"> -</td><td style="width: 25px; text-align:right;border-color:#000000;min-width:25px;">$</td><td style="width: 64px; border-top-style:solid;border-top-width:1px;text-align:right;border-color:#000000;min-width:64px;"> -</td><td style="width: 25px; text-align:right;border-color:#000000;min-width:25px;">$</td><td style="width: 64px; border-top-style:solid;border-top-width:1px;text-align:right;border-color:#000000;min-width:64px;"> 29,536</td></tr><tr style="height: 16px"><td colspan="3" style="width: 282px; text-align:left;border-color:#000000;min-width:282px;">Municipal bonds (maturities one to three years)</td><td style="width: 25px; text-align:right;border-color:#000000;min-width:25px;">$</td><td style="width: 64px; text-align:right;border-color:#000000;min-width:64px;"> 45,867</td><td style="width: 24px; text-align:right;border-color:#000000;min-width:24px;">$</td><td style="width: 64px; text-align:right;border-color:#000000;min-width:64px;"> -</td><td style="width: 25px; text-align:right;border-color:#000000;min-width:25px;">$</td><td style="width: 64px; text-align:right;border-color:#000000;min-width:64px;"> -</td><td style="width: 25px; text-align:right;border-color:#000000;min-width:25px;">$</td><td style="width: 64px; text-align:right;border-color:#000000;min-width:64px;"> 45,867</td></tr><tr style="height: 16px"><td colspan="3" style="width: 282px; text-align:left;border-color:#000000;min-width:282px;">U.S. Treasury notes (maturity one to three years)</td><td style="width: 25px; text-align:right;border-color:#000000;min-width:25px;">$</td><td style="width: 64px; text-align:right;border-color:#000000;min-width:64px;"> 20,129</td><td style="width: 24px; text-align:right;border-color:#000000;min-width:24px;">$</td><td style="width: 64px; text-align:right;border-color:#000000;min-width:64px;"> -</td><td style="width: 25px; text-align:right;border-color:#000000;min-width:25px;">$</td><td style="width: 64px; text-align:right;border-color:#000000;min-width:64px;"> -</td><td style="width: 25px; text-align:right;border-color:#000000;min-width:25px;">$</td><td style="width: 64px; text-align:right;border-color:#000000;min-width:64px;"> 20,129</td></tr><tr style="height: 16px"><td colspan="3" style="width: 282px; text-align:left;border-color:#000000;min-width:282px;">Marketable securities(1)</td><td style="width: 25px; text-align:right;border-color:#000000;min-width:25px;">$</td><td style="width: 64px; text-align:right;border-color:#000000;min-width:64px;"> 4,358</td><td style="width: 24px; text-align:right;border-color:#000000;min-width:24px;">$</td><td style="width: 64px; text-align:right;border-color:#000000;min-width:64px;"> -</td><td style="width: 25px; text-align:right;border-color:#000000;min-width:25px;">$</td><td style="width: 64px; text-align:right;border-color:#000000;min-width:64px;"> -</td><td style="width: 25px; text-align:right;border-color:#000000;min-width:25px;">$</td><td style="width: 64px; text-align:right;border-color:#000000;min-width:64px;"> 4,358</td></tr><tr style="height: 16px"><td colspan="3" style="width: 282px; text-align:left;border-color:#000000;min-width:282px;">Deferred compensation(2)</td><td style="width: 25px; text-align:right;border-color:#000000;min-width:25px;">$</td><td style="width: 64px; text-align:right;border-color:#000000;min-width:64px;"> 4,332</td><td style="width: 24px; text-align:right;border-color:#000000;min-width:24px;">$</td><td style="width: 64px; text-align:right;border-color:#000000;min-width:64px;"> -</td><td style="width: 25px; text-align:right;border-color:#000000;min-width:25px;">$</td><td style="width: 64px; text-align:right;border-color:#000000;min-width:64px;"> -</td><td style="width: 25px; text-align:right;border-color:#000000;min-width:25px;">$</td><td style="width: 64px; text-align:right;border-color:#000000;min-width:64px;"> 4,332</td></tr></table></div><ul><li style="margin-left:36px;list-style:decimal;">The NeuStar, Inc. Deferred Compensation Plan (the Plan) provides directors and certain employees with the ability to defer a portion of their compensation. The assets of the Plan are invested in marketable securities held in a Rabbi Trust and reported at market value in other assets. </li></ul> <ul><li style="margin-left:36px;list-style:decimal;">Obligations to pay benefits under the Plan are included in other long-term liabilities.</li></ul>4. FAIR VALUE MEASUREMENTSFair value is the price that would be received in the sale of asset or paid to transfer a liability in an orderly transactionfalsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThis element represents the disclosure related to the fair value measurement of assets and liabilities which includes [financial] instruments measured at fair value that are classified in stockholders' equity. Such assets and liabilities may be measured on a recurring or nonrecurring basis. The disclosures which may be required or desired include: (1) for assets and liabilities measured on a recurring basis, disclosure may include: (a) the fair value measurements at the reporting date; (b) the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets or liabilities (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3); (c) for fair value measurements using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (i) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (ii) purchases, sales, issuances, and settlements (net); (iii) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs); (d) the amount of the total gains or losses for the period in subparagraph (c) (i) above included in earnings (or changes in net assets) that are attributable to the change in unrealized gains or losses relating to those assets and liabilities still held at the reporting date and a description of where those unrealized gains or losses are reported in the statement of income (or activities); (e) the valuation technique(s) used to measure fair value and a discussion of changes in valuation techniques, if any, during the period and (2) for assets and liabilities that are measured at fair value on a nonrecurring basis (for example, impaired assets) disclosure may include, in addition to (a) above: (a) the reasons for the fair value measurements recorded; (b) the same as (b) above; (c) for fair value measurements using significant unobservable inputs (Level 3), a description of the inputs and the information used to develop the inputs; and (d) the valuation technique(s) used to measure fair value and a discussion of changes, if any, in the valuation technique(s) used to measure similar assets and/or liabilities in prior periods.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 33 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 6 -Footnote 4 falsefalseFAIR VALUE MEASUREMENTS12Fair Value MeasurementsUnKnownUnKnownUnKnownUnKnownfalsetrue