Investments (Tables)
| 9 Months Ended |
|---|
Sep. 30, 2011 |
|---|
| Schedule of Available-for-sale Securities [Line Items] | |
| Other than Temporary Impairment, Credit Losses Recognized in Earnings [Table Text Block] | The following table sets forth the pre-tax amount of other-than-temporary-impairment (“OTTI”) credit losses, recognized in Retained Earnings for Investments in Fixed Maturities held by the Company as of the dates indicated, for which a portion of the OTTI loss has been recognized in Accumulated Other Comprehensive Income, and the corresponding changes in such amounts. | | | | | | | | | | | | | | | | | | | | Nine Months Ended | | Three Months Ended | (Dollars in Millions) | | Sep 30,
2011 | | Sep 30,
2010 | | Sep 30,
2011 | | Sep 30,
2010 | Balance at Beginning of Period | | $ | 2.4 |
| | $ | 3.7 |
| | $ | 2.1 |
| | $ | 5.4 |
| Additions for Previously Unrecognized OTTI Credit Losses | | — |
| | 3.1 |
| | — |
| | — |
| Increases to Previously Recognized OTTI Credit Losses | | — |
| | 2.6 |
| | — |
| | — |
| Reductions to Previously Recognized OTTI Credit Losses | | (0.5 | ) | | (1.6 | ) | | (0.2 | ) | | (0.1 | ) | Reductions due to Intent to Sell Investments | | — |
| | (5.1 | ) | | — |
| | (2.6 | ) | Balance at End of Period | | $ | 1.9 |
| | $ | 2.7 |
| | $ | 1.9 |
| | $ | 2.7 |
|
|
| Investments Classified by Contractual Maturity Date [Table Text Block] | The estimated fair values of the Company’s Investments in Fixed Maturities at September 30, 2011, by contractual maturity, were: | | | | | | (Dollars in Millions) | | | Due in One Year or Less | | $ | 90.3 |
| Due after One Year to Five Years | | 466.7 |
| Due after Five Years to Ten Years | | 942.2 |
| Due after Ten Years | | 2,978.3 |
| Asset-backed Securities Not Due at a Single Maturity Date | | 304.9 |
| Investments in Fixed Maturities | | $ | 4,782.4 |
|
|
| Schedule of Unrealized Loss on Investments [Table Text Block] | An aging of unrealized losses on the Company’s Investments in Fixed Maturities and Equity Securities at December 31, 2010 is presented below: | | | | | | | | | | | | | | | | | | | | | | | | | | | | Less Than 12 Months | | 12 Months or Longer | | Total | (Dollars in Millions) | | Fair Value | | Unrealized Losses | | Fair Value | | Unrealized Losses | | Fair Value | | Unrealized Losses | Fixed Maturities: | | | | | | | | | | | | | U.S. Government and Government Agencies and Authorities | | $ | 18.5 |
| | $ | (0.1 | ) | | $ | 0.1 |
| | $ | — |
| | $ | 18.6 |
| | $ | (0.1 | ) | States and Political Subdivisions | | 455.6 |
| | (16.9 | ) | | 16.5 |
| | (3.8 | ) | | 472.1 |
| | (20.7 | ) | Corporate Securities: | | | | | | | | | | | | | Bonds and Notes | | 123.0 |
| | (3.7 | ) | | 87.8 |
| | (6.4 | ) | | 210.8 |
| | (10.1 | ) | Redeemable Preferred Stocks | | 0.7 |
| | — |
| | — |
| | — |
| | 0.7 |
| | — |
| Mortgage and Asset-backed | | — |
| | — |
| | 4.6 |
| | (1.3 | ) | | 4.6 |
| | (1.3 | ) | Total Fixed Maturities | | 597.8 |
| | (20.7 | ) | | 109.0 |
| | (11.5 | ) | | 706.8 |
| | (32.2 | ) | Equity Securities: | | | | | | | | | | | | | Preferred Stocks: | | | | | | | | | | | | | Finance, Insurance and Real Estate | | 3.0 |
| | — |
| | 2.6 |
| | (0.2 | ) | | 5.6 |
| | (0.2 | ) | Other Industries | | 0.7 |
| | (0.1 | ) | | 2.8 |
| | (0.1 | ) | | 3.5 |
| | (0.2 | ) | Common Stocks: | | | | | | | | | | | | | Manufacturing | | 7.9 |
| | (0.3 | ) | | 1.7 |
| | — |
| | 9.6 |
| | (0.3 | ) | Other Industries | | 6.3 |
| | (0.1 | ) | | — |
| | — |
| | 6.3 |
| | (0.1 | ) | Other Equity Interests: | | | | | | | | | | | | | Limited Liability Companies and Limited Partnerships | | 2.2 |
| | (0.3 | ) | | 6.1 |
| | (0.9 | ) | | 8.3 |
| | (1.2 | ) | Total Equity Securities | | 20.1 |
| | (0.8 | ) | | 13.2 |
| | (1.2 | ) | | 33.3 |
| | (2.0 | ) | Total | | $ | 617.9 |
| | $ | (21.5 | ) | | $ | 122.2 |
| | $ | (12.7 | ) | | $ | 740.1 |
| | $ | (34.2 | ) |
An aging of unrealized losses on the Company’s Investments in Fixed Maturities and Equity Securities at September 30, 2011 is presented below: | | | | | | | | | | | | | | | | | | | | | | | | | | | | Less Than 12 Months | | 12 Months or Longer | | Total | (Dollars in Millions) | | Fair Value | | Unrealized Losses | | Fair Value | | Unrealized Losses | | Fair Value | | Unrealized Losses | Fixed Maturities: | | | | | | | | | | | | | U.S. Government and Government Agencies and Authorities | | $ | 1.3 |
| | $ | — |
| | $ | — |
| | $ | — |
| | $ | 1.3 |
| | $ | — |
| States and Political Subdivisions | | — |
| | — |
| | 12.3 |
| | (0.8 | ) | | 12.3 |
| | (0.8 | ) | Corporate Securities: | | | | | | | | | | | | | Bonds and Notes | | 176.9 |
| | (5.5 | ) | | 67.4 |
| | (4.8 | ) | | 244.3 |
| | (10.3 | ) | Redeemable Preferred Stocks | | 1.0 |
| | (0.3 | ) | | 1.7 |
| | — |
| | 2.7 |
| | (0.3 | ) | Mortgage and Asset-backed | | — |
| | — |
| | 2.9 |
| | (0.7 | ) | | 2.9 |
| | (0.7 | ) | Total Fixed Maturities | | 179.2 |
| | (5.8 | ) | | 84.3 |
| | (6.3 | ) | | 263.5 |
| | (12.1 | ) | Equity Securities: | | | | | | | | | | | | | Preferred Stocks: | | | | | | | | | | | | | Finance, Insurance and Real Estate | | 52.4 |
| | (5.6 | ) | | 2.1 |
| | (0.7 | ) | | 54.5 |
| | (6.3 | ) | Other Industries | | 3.2 |
| | (0.6 | ) | | 2.8 |
| | (0.1 | ) | | 6.0 |
| | (0.7 | ) | Common Stocks: | | | | | | | | | | | | | Manufacturing | | 11.2 |
| | (0.9 | ) | | — |
| | — |
| | 11.2 |
| | (0.9 | ) | Other Industries | | 15.7 |
| | (2.8 | ) | | — |
| | — |
| | 15.7 |
| | (2.8 | ) | Other Equity Interests: | | | | | | | | | | | | | Exchange Traded Funds | | 50.5 |
| | (0.4 | ) | | — |
| | — |
| | 50.5 |
| | (0.4 | ) | Limited Liability Companies and Limited Partnerships | | 43.3 |
| | (5.0 | ) | | 1.6 |
| | (0.3 | ) | | 44.9 |
| | (5.3 | ) | Total Equity Securities | | 176.3 |
| | (15.3 | ) | | 6.5 |
| | (1.1 | ) | | 182.8 |
| | (16.4 | ) | Total | | $ | 355.5 |
| | $ | (21.1 | ) | | $ | 90.8 |
| | $ | (7.4 | ) | | $ | 446.3 |
| | $ | (28.5 | ) |
|
| Schedule of Other Investments [Table Text Block] | The carrying values of the Company’s Other Investments at September 30, 2011 and December 31, 2010 were: | | | | | | | | | | (Dollars in Millions) | | Sep 30,
2011 | | Dec 31,
2010 | Loans to Policyholders at Unpaid Principal | | $ | 248.6 |
| | $ | 238.4 |
| Real Estate at Depreciated Cost | | 241.8 |
| | 249.9 |
| Trading Securities at Fair Value | | 4.2 |
| | 5.1 |
| Other | | 0.6 |
| | 0.8 |
| Total | | $ | 495.2 |
| | $ | 494.2 |
|
|
Equity Securities [Member] | |
| Schedule of Available-for-sale Securities [Line Items] | |
| Schedule of Available-for-sale Securities Reconciliation [Table Text Block] | Gross unrealized gains and gross unrealized losses on the Company’s Investments in Equity Securities at December 31, 2010 were: | | | | | | | | | | | | | | | | | | | | | | Gross Unrealized | | | (Dollars in Millions) | | Cost | | Gains | | Losses | | Fair Value | Preferred Stocks: | | | | | | | | | Finance, Insurance and Real Estate | | $ | 94.4 |
| | $ | 3.5 |
| | $ | (0.2 | ) | | $ | 97.7 |
| Other Industries | | 20.0 |
| | 7.6 |
| | (0.2 | ) | | 27.4 |
| Common Stocks: | | | | | | | | | Intermec | | 86.9 |
| | 50.6 |
| | — |
| | 137.5 |
| Manufacturing | | 75.3 |
| | 14.6 |
| | (0.3 | ) | | 89.6 |
| Other Industries | | 37.3 |
| | 6.6 |
| | (0.1 | ) | | 43.8 |
| Other Equity Interests: | | | | | | | | | Exchange Traded Funds | | 76.5 |
| | 2.7 |
| | — |
| | 79.2 |
| Limited Liability Companies and Limited Partnerships | | 58.8 |
| | 17.6 |
| | (1.2 | ) | | 75.2 |
| Investments in Equity Securities | | $ | 449.2 |
| | $ | 103.2 |
| | $ | (2.0 | ) | | $ | 550.4 |
|
Gross unrealized gains and gross unrealized losses on the Company’s Investments in Equity Securities at September 30, 2011 were: | | | | | | | | | | | | | | | | | | | | | | Gross Unrealized | | | (Dollars in Millions) | | Cost | | Gains | | Losses | | Fair Value | Preferred Stocks: | | | | | | | | | Finance, Insurance and Real Estate | | $ | 94.4 |
| | $ | 0.8 |
| | $ | (6.3 | ) | | $ | 88.9 |
| Other Industries | | 18.3 |
| | 2.6 |
| | (0.7 | ) | | 20.2 |
| Common Stocks: | | | | | | | | | Manufacturing | | 63.6 |
| | 9.6 |
| | (0.9 | ) | | 72.3 |
| Other Industries | | 40.3 |
| | 4.0 |
| | (2.8 | ) | | 41.5 |
| Other Equity Interests: | | | | | | | | | Exchange Traded Funds | | 66.0 |
| | 0.1 |
| | (0.4 | ) | | 65.7 |
| Limited Liability Companies and Limited Partnerships | | 72.4 |
| | 5.1 |
| | (5.3 | ) | | 72.2 |
| Investments in Equity Securities | | $ | 355.0 |
| | $ | 22.2 |
| | $ | (16.4 | ) | | $ | 360.8 |
|
|
Debt Securities [Member] | |
| Schedule of Available-for-sale Securities [Line Items] | |
| Schedule of Available-for-sale Securities Reconciliation [Table Text Block] | The amortized cost and estimated fair values of the Company’s Investments in Fixed Maturities at September 30, 2011 were: | | | | | | | | | | | | | | | | | | | | Amortized Cost | | Gross Unrealized | | Fair Value | (Dollars in Millions) | | Gains | | Losses | | U.S. Government and Government Agencies and Authorities | | $ | 464.7 |
| | $ | 52.0 |
| | $ | — |
| | $ | 516.7 |
| States and Political Subdivisions | | 1,761.0 |
| | 143.1 |
| | (0.8 | ) | | 1,903.3 |
| Corporate Securities: | | | | | | | | | Bonds and Notes | | 1,977.7 |
| | 307.8 |
| | (10.3 | ) | | 2,275.2 |
| Redeemable Preferred Stocks | | 78.4 |
| | 3.4 |
| | (0.3 | ) | | 81.5 |
| Mortgage and Asset-backed | | 5.3 |
| | 1.1 |
| | (0.7 | ) | | 5.7 |
| Investments in Fixed Maturities | | $ | 4,287.1 |
| | $ | 507.4 |
| | $ | (12.1 | ) | | $ | 4,782.4 |
|
The amortized cost and estimated fair values of the Company’s Investments in Fixed Maturities at December 31, 2010 were: | | | | | | | | | | | | | | | | | | | | Amortized Cost | | Gross Unrealized | | Fair Value | (Dollars in Millions) | | Gains | | Losses | | U.S. Government and Government Agencies and Authorities | | $ | 508.6 |
| | $ | 28.4 |
| | $ | (0.1 | ) | | $ | 536.9 |
| States and Political Subdivisions | | 1,760.0 |
| | 53.5 |
| | (20.7 | ) | | 1,792.8 |
| Corporate Securities: | | | | | | | | | Bonds and Notes | | 1,880.3 |
| | 178.8 |
| | (10.1 | ) | | 2,049.0 |
| Redeemable Preferred Stocks | | 83.4 |
| | 4.9 |
| | — |
| | 88.3 |
| Mortgage and Asset-backed | | 8.5 |
| | 1.1 |
| | (1.3 | ) | | 8.3 |
| Investments in Fixed Maturities | | $ | 4,240.8 |
| | $ | 266.7 |
| | $ | (32.2 | ) | | $ | 4,475.3 |
|
|