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Fair Value Measurements | 12 Months Ended
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Dec. 31, 2017
Fair Value Disclosures [Abstract] |
Fair Value Measurements | NOTE 22. FAIR VALUE MEASUREMENTS The Company classifies its Investments in Fixed Maturities and Equity Securities as available for sale and reports these investments at fair value. The Company has elected the fair value option method of accounting for investments in certain hedge funds and, accordingly, reports these investments at fair value. The Company classifies certain investments in mutual funds included in Other Investments as trading securities and reports these investments at fair value. The Company has a derivative instrument that is classified as a cash flow hedge and reported in Other Liabilities at fair value at December 31, 2017. The Company had a separate derivative instrument that was classified as a cash flow hedge and reported in Other Assets at fair value at December 31, 2016. The Company has no material liabilities that are measured and reported at fair value. The valuation of assets and liabilities measured at fair value in the Company’s Consolidated Balance Sheet at December 31, 2017 is summarized below.
DOLLARS IN MILLIONS |  | Fair Value Measurements |  |  |  | Fair Value
Quoted Prices in Active Markets for Identical Assets (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3) |  | Measured at Net Asset Value |
Fixed Maturities: |  |  |  |  |  |  |  |  |  |
U.S. Government and Government Agencies and Authorities |  | $ | 115.8 |  |  | $ | 440.3 |  |  | $ | — |  |  | — |  |  | $ | 556.1 |
States and Political Subdivisions |  | — |  |  | 1,701.8 |  |  | — |  |  | — |  |  | 1,701.8 |
Foreign Governments |  | — |  |  | 3.2 |  |  | — |  |  | — |  |  | 3.2 |
Corporate Securities: |  |  |  |  |  |  |  |  |  |
Bonds and Notes |  | — |  |  | 2,579.1 |  |  | 401.5 |  |  | — |  |  | 2,980.6 |
Redeemable Preferred Stocks |  | — |  |  | — |  |  | 0.1 |  |  | — |  |  | 0.1 |
Collateralized Loan Obligations |  | — |  |  | 46.6 |  |  | 93.2 |  |  | — |  |  | 139.8 |
Other Mortgage- and Asset-backed |  | — |  |  | 1.1 |  |  | — |  |  | — |  |  | 1.1 |
Total Investments in Fixed Maturities |  | 115.8 |  |  | 4,772.1 |  |  | 494.8 |  |  | — |  |  | 5,382.7 |
Equity Securities: |  |  |  |  |  |  |  |  |  |
Preferred Stocks: |  |  |  |  |  |  |  |  |  |
Finance, Insurance and Real Estate |  | — |  |  | 55.7 |  |  | — |  |  | — |  |  | 55.7 |
Other Industries |  | — |  |  | 12.3 |  |  | 10.8 |  |  | — |  |  | 23.1 |
Common Stocks: |  |  |  |  |  |  |  |  |  |
Finance, Insurance and Real Estate |  | 7.0 |  |  | 0.1 |  |  | — |  |  | — |  |  | 7.1 |
Other Industries |  | 0.7 |  |  | 0.4 |  |  | 16.6 |  |  | — |  |  | 17.7 |
Other Equity Interests: |  |  |  |  |  |  |  |  |  |
Exchange Traded Funds |  | 219.5 |  |  | — |  |  | — |  |  | — |  |  | 219.5 |
Limited Liability Companies and Limited Partnerships |  | — |  |  | — |  |  | 34.4 |  |  | 168.5 |  |  | 202.9 |
Total Investments in Equity Securities |  | 227.2 |  |  | 68.5 |  |  | 61.8 |  |  | 168.5 |  |  | 526.0 |
Fair Value Option Investments: |  |  |  |  |  |  |  |  |  |
Limited Liability Companies and Limited Partnerships Hedge Funds |  | — |  |  | — |  |  | — |  |  | 77.5 |  |  | 77.5 |
Other Investments: |  |  |  |  |  |  |  |  |  |
Trading Securities |  | 6.7 |  |  | — |  |  | — |  |  | — |  |  | 6.7 |
Other Liabilities: |  |  |  |  |  |  |  |  |  |
Derivative Instrument Classified as Cash Flow Hedge |  | — |  |  | (0.8 | ) |  | — |  |  | — |  |  | (0.8 | )
Total |  | $ | 349.7 |  |  | $ | 4,839.8 |  |  | $ | 556.6 |  |  | $ | 246.0 |  |  | $ | 5,992.1 |
NOTE 22. FAIR VALUE MEASUREMENTS (Continued) At December 31, 2017, the Company had unfunded commitments to invest an additional $141.3 million in certain limited liability investment companies and limited partnerships that will be included in Other Equity Interests when funded. The valuation of assets measured at fair value in the Company’s Consolidated Balance Sheet at December 31, 2016 is summarized below.
DOLLARS IN MILLIONS |  | Fair Value Measurements |  | Fair Value
Quoted Prices in Active Markets for Identical Assets (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3) |  | Measured at Net Asset Value |
Fixed Maturities: |  |  |  |  |  |  |  |  |  |
U.S. Government and Government Agencies and Authorities |  | $ | 119.5 |  |  | $ | 216.8 |  |  | $ | — |  |  | $ | — |  |  | $ | 336.3 |
States and Political Subdivisions |  | — |  |  | 1,711.1 |  |  | 3.8 |  |  | — |  |  | 1,714.9 |
Foreign Governments |  | — |  |  | 3.4 |  |  | — |  |  | — |  |  | 3.4 |
Corporate Securities: |  |  |  |  |  |  |  |  |  |
Bonds and Notes |  | — |  |  | 2,541.6 |  |  | 403.2 |  |  | — |  |  | 2,944.8 |
Redeemable Preferred Stocks |  | — |  |  | — |  |  | 0.6 |  |  | — |  |  | 0.6 |
Collateralized Loan Obligations |  | — |  |  | 19.3 |  |  | 103.5 |  |  | — |  |  | 122.8 |
Other Mortgage- and Asset-backed |  | — |  |  | 2.1 |  |  | — |  |  | — |  |  | 2.1 |
Total Investments in Fixed Maturities |  | 119.5 |  |  | 4,494.3 |  |  | 511.1 |  |  | — |  |  | 5,124.9 |
Equity Securities: |  |  |  |  |  |  |  |  |  |
Preferred Stocks: |  |  |  |  |  |  |  |  |  |
Finance, Insurance and Real Estate |  | — |  |  | 59.6 |  |  | — |  |  | — |  |  | 59.6 |
Other Industries |  | — |  |  | 11.4 |  |  | 11.5 |  |  | — |  |  | 22.9 |
Common Stocks: |  |  |  |  |  |  |  |  |  |
Finance, Insurance and Real Estate |  | 26.4 |  |  | — |  |  | 7.1 |  |  | — |  |  | 33.5 |
Other Industries |  | 0.4 |  |  | 0.2 |  |  | 11.1 |  |  | — |  |  | 11.7 |
Other Equity Interests: |  |  |  |  |  |  |  |  |  |
Exchange Traded Funds |  | 144.4 |  |  | — |  |  | — |  |  | — |  |  | 144.4 |
Limited Liability Companies and Limited Partnerships |  | — |  |  | — |  |  | 40.9 |  |  | 168.7 |  |  | 209.6 |
Total Investments in Equity Securities |  | 171.2 |  |  | 71.2 |  |  | 70.6 |  |  | 168.7 |  |  | 481.7 |
Fair Value Option Investments: |  |  |  |  |  |  |  |  |  |
Limited Liability Companies and Limited Partnerships Hedge Funds |  | — |  |  | — |  |  | — |  |  | 111.4 |  |  | 111.4 |
Other Investments: |  |  |  |  |  |  |  |  |  |
Trading Securities |  | 5.3 |  |  | — |  |  | — |  |  | — |  |  | 5.3 |
Other Assets: |  |  |  |  |  |  |  |  |  |
Derivative Instrument Classified as Cash Flow Hedge |  | — |  |  | 1.6 |  |  | — |  |  | — |  |  | 1.6 |
Total |  | $ | 296.0 |  |  | $ | 4,567.1 |  |  | $ | 581.7 |  |  | 280.1 |  |  | $ | 5,724.9 |
NOTE 22. FAIR VALUE MEASUREMENTS (Continued) The Company’s investments in Fixed Maturities that are classified as Level 1 in the two preceding tables primarily consist of U.S. Treasury Bonds and Notes. The Company’s investments in Equity Securities that are classified as Level 1 in the two preceding tables consist either of investments in publicly-traded common stocks or exchange traded funds. The Company’s investments in Fixed Maturities that are classified as Level 2 in the two preceding tables primarily consist of investments in corporate bonds, obligations of states and political subdivisions, and bonds and mortgage-backed securities of U.S. government agencies. The Company’s investments in Equity Securities that are classified as Level 2 in the two preceding tables primarily consist of investments in preferred stocks. The Company uses a leading, nationally recognized provider of market data and analytics to price the vast majority of the Company’s Level 2 measurements. The provider utilizes evaluated pricing models that vary by asset class and incorporate available trade, bid and other market information. Because many fixed maturity securities do not trade on a daily basis, the provider’s evaluated pricing applications apply available information through processes such as benchmark curves, benchmarking of like securities, sector groupings, and matrix pricing to prepare evaluations. In addition, the provider uses model processes to develop prepayment and interest rate scenarios. The pricing provider’s models and processes also take into account market convention. For each asset class, teams of its evaluators gather information from market sources and integrate relevant credit information, perceived market movements and sector news into the evaluated pricing applications and models. The Company generally validates the measurements obtained from its primary pricing provider by comparing them with measurements obtained from one additional pricing provider that provides either prices from recent market transactions or quotes in inactive markets or evaluations based on its own proprietary models. The Company investigates significant differences related to the values provided. On completion of its investigation, management exercises judgment to determine the price selected and whether adjustments, if any, to the price obtained from the Company’s primary pricing provider would warrant classification of the price as Level 3. In instances where a measurement cannot be obtained from either pricing provider, the Company generally will evaluate bid prices from one or more binding quotes obtained from market makers to value investments in inactive markets and classified by the Company as Level 2. The Company generally classifies securities when it receives non-binding quotes or indications as Level 3 securities unless the Company can validate the quote or indication against recent transactions in the market. The Company’s investments in Fixed Maturities that are classified as Level 3 in the two preceding tables primarily consist of privately placed securities not rated by a Nationally Recognized Statistical Rating Organization and are priced primarily using a market yield approach. A market yield approach uses a risk-free rate plus a credit spread depending on the underlying credit profile of the security. For floating rate securities, the risk-free rate used in the market yield is the contractual floating rate of the security. For each individual security, the Company or the Company’s third party appraiser gathers information from market sources, relevant credit information, perceived market movements and sector news and determines an appropriate market yield for each security. The market yield selected is then used to discount the estimated future cash flows of the security to determine the fair value. The Company separately evaluates market yields based upon asset class to assess the reasonableness of the recorded fair value. For non-investment-grade investments in Fixed Maturities that are classified as Level 3, the two primary asset classes are senior debt and junior debt. Senior debt includes those securities that receive first priority in a liquidation and junior debt includes any fixed maturity security with other than first priority in a liquidation. The table below presents quantitative information about the significant unobservable inputs utilized by the Company in determining fair values for fixed maturity investments in corporate securities classified as Level 3 at December 31, 2017.
DOLLARS IN MILLIONS |  | Unobservable Input |  | Total Fair Value |  | Range of Unobservable Inputs |  | Weighted Average Yield
Investment-grade |  | Market Yield |  | $ | 96.2 |  |  | 3.0 | % | - | 6.7 | % |  | 3.8 | %
Non-investment-grade: |  |  |  |  |  |  |  |  |  |
Senior Debt |  | Market Yield |  | 138.1 |  |  | 4.5 |  | - | 15.7 |  |  | 10.0 |
Junior Debt |  | Market Yield |  | 154.1 |  |  | 9.6 |  | - | 24.3 |  |  | 12.9 |
Collateralized Loan Obligations (investment-grade and non-investment-grade) |  | Market Yield |  | 93.2 |  |  | 4.3 |  | - | 10.6 |  |  | 7.8 |
Other |  | Various |  | 13.2 |  |  |  |  |  |  |
Total Fixed Maturity Investments in Corporate Securities |  |  |  | $ | 494.8 |  |  |  |  |  |  |
NOTE 22. FAIR VALUE MEASUREMENTS (Continued) The table below presents quantitative information about the significant unobservable inputs utilized by the Company in determining fair values for fixed maturity investments in corporate securities classified as Level 3 at December 31, 2016.
DOLLARS IN MILLIONS |  | Unobservable Input |  | Total Fair Value |  | Range of Unobservable Inputs |  | Weighted Average Yield
Investment-grade |  | Market Yield |  | $ | 106.1 |  |  | 2.7 | % | - | 5.1 | % |  | 3.8 | %
Non-investment-grade: |  |  |  |  |  |  |  |  |  |
Senior Debt |  | Market Yield |  | 142.2 |  |  | 4.8 |  | - | 14.0 |  |  | 9.6 |
Junior Debt |  | Market Yield |  | 143.3 |  |  | 9.5 |  | - | 20.0 |  |  | 13.0 |
Collateralized Loan Obligations |  | Market Yield |  | 103.5 |  |  | 3.7 |  | - | 9.9 |  |  | 6.3 |
Other |  | Various |  | 16.0 |  |  |  |  |  |  |
Total Fixed Maturity Investments in Corporate Securities |  |  |  | $ | 511.1 |  |  |  |  |  |  |
For an investment in a fixed maturity security, an increase in the yield used to determine the fair value of the security will decrease the fair value of the security. A decrease in the yield used to determine fair value will increase the fair value of the security, but the fair value increase is generally limited to par, unless callable at a premium, if the security is currently callable. The Company’s other investments that are classified as Level 3 primarily consist of Limited Liability Companies and Limited Partnerships, but also certain Preferred Stocks and Common Stocks. The Company either uses valuations provided by third party fund managers, third party appraisers, or that are generated internally. These valuations typically employ various valuation techniques commonly used in the industry, including earnings multiples based on comparable public securities, industry-specific non-earnings based multiples, market yields based on comparable public securities and discounted cash flow models. Information by security type pertaining to the changes in the fair value of the Company’s investments classified as Level 3 for the year ended December 31, 2017 is presented below.
DOLLARS IN MILLIONS |  | Fixed Maturities |  | Equity Securities |  |
| Corporate Bonds and Notes |  | States and Political Sub-divisions |  | Redeemable Preferred Stocks |  | Collateralized Loan Obligations |  | Other Mortgage- and Asset- backed |  | Preferred and Common Stocks |  | Other Equity Interests |  | Total
Balance at Beginning of Year |  | $ | 403.2 |  |  | $ | 3.8 |  |  | $ | 0.6 |  |  | $ | 103.5 |  |  | $ | — |  |  | $ | 29.7 |  |  | $ | 40.9 |  |  | $ | 581.7 |
Total Gains (Losses): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Included in Consolidated Statements of Income |  | (5.7 | ) |  | (1.2 | ) |  | 0.1 |  |  | 1.5 |  |  | — |  |  | 1.4 |  |  | 4.0 |  |  | 0.1 |
Included in Other Comprehensive Income |  | 4.9 |  |  | 0.1 |  |  | (0.1 | ) |  | 2.4 |  |  | — |  |  | 3.4 |  |  | (4.8 | ) |  | 5.9 |
Purchases |  | 171.0 |  |  | — |  |  | — |  |  | 34.0 |  |  | — |  |  | 4.6 |  |  | 3.1 |  |  | 212.7 |
Settlements |  | (110.6 | ) |  | (2.6 | ) |  | (0.5 | ) |  | (33.5 | ) |  | — |  |  | — |  |  | — |  |  | (147.2 | )
Sales |  | (40.8 | ) |  | — |  |  | — |  |  | (7.9 | ) |  | — |  |  | (8.2 | ) |  | (8.8 | ) |  | (65.7 | )
Transfers into Level 3 |  | 8.1 |  |  | 1.4 |  |  | — |  |  | 5.0 |  |  | — |  |  | — |  |  | — |  |  | 14.5 |
Transfers out of Level 3 |  | (28.6 | ) |  | (1.5 | ) |  | — |  |  | (11.8 | ) |  | — |  |  | (3.5 | ) |  | — |  |  | (45.4 | )
Balance at End of Year |  | $ | 401.5 |  |  | $ | — |  |  | $ | 0.1 |  |  | $ | 93.2 |  |  | $ | — |  |  | $ | 27.4 |  |  | $ | 34.4 |  |  | $ | 556.6 |
The Company’s policy is to recognize transfers between levels as of the end of the reporting period. There were no transfers between Levels 1 and 2 for the year ended December 31, 2017. Transfers out of Level 3 were $45.4 million for the year ended December 31, 2017, of which $3.5 million was transferred into Level 1 due to an issuer’s initial public offering of the security and $41.9 million was transferred into Level 2 due to changes in the availability of market observable inputs. NOTE 22. FAIR VALUE MEASUREMENTS (Continued) Information by security type pertaining to the changes in the fair value of the Company’s investments classified as Level 3 for the year ended December 31, 2016 is presented below.
DOLLARS IN MILLIONS |  | Fixed Maturities |  | Equity Securities |  | Total
Corporate Bonds and Notes |  | States and Political Sub-divisions |  | Redeemable Preferred Stocks |  | Collateralized Loan Obligations |  | Other Mortgage- and Asset- backed |  | Preferred and Common Stocks |  | Other Equity Interests |
Balance at Beginning of Year |  | $ | 436.3 |  |  | $ | — |  |  | $ | 3.8 |  |  | $ | 87.3 |  |  | $ | 3.8 |  |  | $ | 30.0 |  |  | $ | 45.6 |  |  | $ | 606.8 |
Total Gains (Losses): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Included in Consolidated Statement of Income |  | (23.0 | ) |  | (0.3 | ) |  | — |  |  | — |  |  | 0.4 |  |  | (1.7 | ) |  | (1.6 | ) |  | (26.2 | )
Included in Other Comprehensive Income |  | 0.9 |  |  | — |  |  | — |  |  | 4.3 |  |  | (0.3 | ) |  | 3.4 |  |  | (2.4 | ) |  | 5.9 |
Purchases |  | 203.7 |  |  | — |  |  | — |  |  | 29.1 |  |  | — |  |  | 7.9 |  |  | 3.9 |  |  | 244.6 |
Settlements |  | (85.4 | ) |  | — |  |  | (3.2 | ) |  | (5.0 | ) |  | (3.0 | ) |  | (5.2 | ) |  | — |  |  | (101.8 | )
Sales |  | (114.5 | ) |  | — |  |  | — |  |  | (1.9 | ) |  | — |  |  | (4.7 | ) |  | (4.6 | ) |  | (125.7 | )
Transfers into Level 3 |  | — |  |  | 4.1 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 4.1 |
Transfers out of Level 3 |  | (14.8 | ) |  | — |  |  | — |  |  | (10.3 | ) |  | (0.9 | ) |  | — |  |  | — |  |  | (26.0 | )
Balance at End of Year |  | $ | 403.2 |  |  | $ | 3.8 |  |  | $ | 0.6 |  |  | $ | 103.5 |  |  | $ | — |  |  | $ | 29.7 |  |  | $ | 40.9 |  |  | $ | 581.7 |
The Company’s policy is to recognize transfers between levels as of the end of the reporting period. There were no transfers between Levels 1 and 2 or Levels 1 and 3 for the year ended December 31, 2016. The transfers out of Level 3 for the year ended December 31, 2016 were due to changes in the availability of market observable inputs. The fair value of Debt is estimated using quoted prices for similar liabilities in markets that are not active. The inputs used in the valuation are considered Level 2 measurements. The fair value of Short-term Investments is estimated using inputs that are considered Level 1 or Level 2 measurements.

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- Definition The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14064-108612 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13537-108611 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13504-108611 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13433-108611 + Details
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