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Collateral Finance Facility (Narrative Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Collateral Finance Facility [Line Items] |  |  |
Direct investment in subsidiary | $ 112,800,000 |  |
Assets held in trust and held in custody | 909,200,000 | 896,100,000 |
Collateral Financing Expense | 12,197,000 | 12,391,000 | 7,856,000
Amount Held In Debt Service Coverage Account | 33,200,000 | 33,500,000 |
Repurchased Subsidiary Debt |  | 198,500,000 |
Repayments of Secured Debt | 0 | 130,798,000 | 0
Gain on repurchase of long-term debt | 0 | 65,565,000 | 0
Statutory Accounting Practices, Statutory Capital and Surplus, Balance | 35,000,000 |  |
Timberlake Reinsurance Company [Member] |  |  |
Collateral Finance Facility [Line Items] |  |  |
Statutory Accounting Practices, Statutory Capital and Surplus, Balance | 33,000,000 |  |
Timerberlake Financial [Member] |  |  |
Collateral Finance Facility [Line Items] |  |  |
Debt Instrument, Issuance Date | June 2006 |  |
Debt Instrument, Face Amount | 850,000,000 |  |
Collateral Financing Expense | 6,900,000 | 7,100,000 | 7,900,000
Repayments of Secured Debt |  | 130,800,000 |
Gain on repurchase of long-term debt |  | 65,600,000 |
Manor Reinsurance [Member] |  |  |
Collateral Finance Facility [Line Items] |  |  |
Debt Instrument, Face Amount | 300,000,000 |  |
Collateral Financing Expense | $ 5,300,000 | $ 5,300,000 |

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- Definition The total amount of cash and securities held by third party trustees pursuant to terms of debt instruments or other agreements as of the date of each statement of financial position presented, which can be used by the trustee only to pay the noncurrent portion of specified obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 140 -Paragraph 17 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 140 -Paragraph 61 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(b)) -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690 + Details
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- Definition Amount represents the difference between the fair value of the payments made and the carrying amount of the debt at the time of its extinguishment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6850294&loc=d3e12355-112629 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 26 -Paragraph 20, 21 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6850294&loc=d3e12317-112629 + Details
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