v2.4.0.6

Fair Value Measurements (Assets and Liabilities Measured at Fair Value on a Recurring Basis Using Level 3 Inputs) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended |
--- | --- | ---
Mar. 31, 2013 | Mar. 31, 2012 | Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Other investments | $ 652,802 |  |  | $ 644,711 |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |
Balance at beginning of the period | 434,799 |  | 452,813 |  |
Total unrealized gains (losses) |  |  |  |  |
Included in net investment income | 13,291 |  | 29,184 |  |
Included in other income (loss) | 9,776 |  | 18,563 |  |
Total realized gains (losses) |  |  |  |  |
Included in other income (loss) | 6,108 |  | (55,308) |  |
Total foreign exchange gains (losses) | (861) |  | 353 |  |
Purchases | 10,785 |  | 21,970 |  |
Sales | (424) |  | (13,431) |  |
Settlements | (21,873) |  | 40,376 |  |
Reclassified from other assets to other investments | 0 |  |  |  |
Net transfers into Level 3 | 0 |  | 0 |  |
Balance at end of the period | 451,601 |  | 494,520 |  |
Change in unrealized gains for the period included in earnings for assets held at the end of the period included in net investment income (loss) | 13,291 |  | 29,184 |  |
Change in unrealized losses for the period included in earnings for assets held at the end of the period included in other (loss) income | 11,893 |  | 10,513 |  |
Assets and (liabilities) at fair value | 22,958 |  |  | 29,085 |
Fixed maturity investments [Member] |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |
Balance at beginning of the period | 27,792 |  | 27,761 |  |
Total unrealized gains (losses) |  |  |  |  |
Included in net investment income | 275 |  | 77 |  |
Included in other income (loss) | 0 |  | 0 |  |
Total realized gains (losses) |  |  |  |  |
Included in other income (loss) | 0 |  | 0 |  |
Total foreign exchange gains (losses) | 0 |  | 0 |  |
Purchases | 0 |  | 0 |  |
Sales | 0 |  | 0 |  |
Settlements | 0 |  | 0 |  |
Reclassified from other assets to other investments | 0 |  |  |  |
Net transfers into Level 3 | 0 |  | 0 |  |
Balance at end of the period | 28,067 |  | 27,838 |  |
Change in unrealized gains for the period included in earnings for assets held at the end of the period included in net investment income (loss) | 275 |  | 77 |  |
Change in unrealized losses for the period included in earnings for assets held at the end of the period included in other (loss) income | 0 |  | 0 |  |
Other Investments [Member] |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |
Balance at beginning of the period | 381,067 |  | 396,526 |  |
Total unrealized gains (losses) |  |  |  |  |
Included in net investment income | 13,016 |  | 29,107 |  |
Included in other income (loss) | 0 |  | 0 |  |
Total realized gains (losses) |  |  |  |  |
Included in other income (loss) | 0 |  | 0 |  |
Total foreign exchange gains (losses) | (781) |  | 730 |  |
Purchases | 10,785 |  | 12,689 |  |
Sales | (424) |  | 0 |  |
Settlements | (19,699) |  | (20,515) |  |
Reclassified from other assets to other investments | 18,242 |  |  |  |
Net transfers into Level 3 | 0 |  | 0 |  |
Balance at end of the period | 402,206 |  | 418,537 |  |
Change in unrealized gains for the period included in earnings for assets held at the end of the period included in net investment income (loss) | 13,016 |  | 29,107 |  |
Change in unrealized losses for the period included in earnings for assets held at the end of the period included in other (loss) income | 0 |  | 0 |  |
Other Assets and (Liabilities) [Member] |  |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |  |
Balance at beginning of the period | 25,940 |  | 28,526 |  |
Total unrealized gains (losses) |  |  |  |  |
Included in net investment income | 0 |  | 0 |  |
Included in other income (loss) | 9,776 |  | 18,563 |  |
Total realized gains (losses) |  |  |  |  |
Included in other income (loss) | 6,108 |  | (55,308) |  |
Total foreign exchange gains (losses) | (80) |  | (377) |  |
Purchases | 0 |  | 9,281 |  |
Sales | 0 |  | (13,431) |  |
Settlements | (2,174) |  | 60,891 |  |
Reclassified from other assets to other investments | (18,242) |  |  |  |
Net transfers into Level 3 | 0 |  | 0 |  |
Balance at end of the period | 21,328 |  | 48,145 |  |
Change in unrealized gains for the period included in earnings for assets held at the end of the period included in net investment income (loss) | 0 |  | 0 |  |
Change in unrealized losses for the period included in earnings for assets held at the end of the period included in other (loss) income | 11,893 |  | 10,513 |  |
Fair Value, Inputs, Level 3 [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Assets, Fair Value Disclosure, Recurring | 451,601 |  |  |  |
Other investments | 402,206 |  |  | 381,067 |
Total realized gains (losses) |  |  |  |  |
Assets (Liabilities), Fair Value Disclosure, Recurring | 21,328 |  |  |  |
Assets and (liabilities) at fair value | 21,328 |  |  | 25,940 |
Fair Value, Inputs, Level 3 [Member] | Fixed maturity investments [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Assets, Fair Value Disclosure, Recurring | 28,067 |  |  |  |
Fair Value, Inputs, Level 3 [Member] | Other Investments [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Assets, Fair Value Disclosure, Recurring | 402,206 |  |  |  |
Fair Value, Inputs, Level 3 [Member] | Discounted Cash Flow Valuation Technique [Member] | Corporate [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Assets, Fair Value Disclosure, Recurring | 17,813 |  |  |  |
Fair Value, Inputs, Level 3 [Member] | Internal Valuation Model Valuation Technique [Member] | Corporate [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Assets, Fair Value Disclosure, Recurring | 10,254 |  |  |  |
Fair Value, Inputs, Level 3 [Member] | Internal Valuation Model Valuation Technique [Member] | Assumed And Ceded Re Insurance Contracts Member |  |  |  |  |
Total realized gains (losses) |  |  |  |  |
Assets (Liabilities), Fair Value Disclosure, Recurring | 676 |  |  |  |
Assets and (liabilities) at fair value | 676 |  |  |  |
Fair Value, Inputs, Level 3 [Member] | Internal Valuation Model Valuation Technique [Member] | Other [Member] |  |  |  |  |
Total realized gains (losses) |  |  |  |  |
Assets (Liabilities), Fair Value Disclosure, Recurring | 625 |  |  |  |
Fair Value, Inputs, Level 3 [Member] | Net Asset Valuation Technique [Member] | Private Equity Funds [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Assets, Fair Value Disclosure, Recurring | 345,666 |  |  |  |
Other investments | 345,666 |  |  |  |
Fair Value, Inputs, Level 3 [Member] | Net Asset Valuation Technique [Member] | Senior secured bank loan funds [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Assets, Fair Value Disclosure, Recurring | 28,537 |  |  |  |
Other investments | 28,537 |  |  |  |
Fair Value, Inputs, Level 3 [Member] | Net Asset Valuation Technique [Member] | Hedge funds [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Assets, Fair Value Disclosure, Recurring | 5,219 |  |  |  |
Other investments | 5,219 |  |  |  |
Fair Value, Inputs, Level 3 [Member] | Net Asset Valuation Technique [Member] | Other [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Assets, Fair Value Disclosure, Recurring | 22,784 |  |  |  |
Total realized gains (losses) |  |  |  |  |
Assets (Liabilities), Fair Value Disclosure, Recurring | 22,784 |  |  |  |
Weighted Average or Actual [Member] | Fair Value, Inputs, Level 3 [Member] | Discounted Cash Flow Valuation Technique [Member] | Corporate [Member] |  |  |  |  |
Total realized gains (losses) |  |  |  |  |
Credit spread | 2.40% |  |  |  |
Liquidity premium | 1.00% |  |  |  |
Risk-free rate | 0.10% |  |  |  |
Dividend rate | 5.90% |  |  |  |
Weighted Average or Actual [Member] | Fair Value, Inputs, Level 3 [Member] | Net Asset Valuation Technique [Member] | Private Equity Funds [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Inputs, Estimated Performance | 4.90% |  |  |  |
Weighted Average or Actual [Member] | Fair Value, Inputs, Level 3 [Member] | Net Asset Valuation Technique [Member] | Senior secured bank loan funds [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Inputs, Estimated Performance | 1.30% |  |  |  |
Weighted Average or Actual [Member] | Fair Value, Inputs, Level 3 [Member] | Net Asset Valuation Technique [Member] | Hedge funds [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Inputs, Estimated Performance | 0.00% |  |  |  |
Weighted Average or Actual [Member] | Fair Value, Inputs, Level 3 [Member] | Net Asset Valuation Technique [Member] | Other [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Inputs, Estimated Performance | 0.90% |  |  |  |
Minimum [Member] | Fair Value, Inputs, Level 3 [Member] | Net Asset Valuation Technique [Member] | Private Equity Funds [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Inputs, Estimated Performance | (12.00%) |  |  |  |
Minimum [Member] | Fair Value, Inputs, Level 3 [Member] | Net Asset Valuation Technique [Member] | Senior secured bank loan funds [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Inputs, Estimated Performance | 0.80% |  |  |  |
Minimum [Member] | Fair Value, Inputs, Level 3 [Member] | Net Asset Valuation Technique [Member] | Hedge funds [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Inputs, Estimated Performance | 0.00% |  |  |  |
Maximum [Member] | Fair Value, Inputs, Level 3 [Member] | Net Asset Valuation Technique [Member] | Private Equity Funds [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Inputs, Estimated Performance | 120.00% |  |  |  |
Maximum [Member] | Fair Value, Inputs, Level 3 [Member] | Net Asset Valuation Technique [Member] | Senior secured bank loan funds [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Inputs, Estimated Performance | 2.10% |  |  |  |
Maximum [Member] | Fair Value, Inputs, Level 3 [Member] | Net Asset Valuation Technique [Member] | Hedge funds [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value Inputs, Estimated Performance | 0.00% |  |  |  |
Derivatives Assets (Liabilities) Member |  |  |  |  |
Total realized gains (losses) |  |  |  |  |
Assets and (liabilities) at fair value | 23,663 | [1] |  | 19,123 | [1]
Derivatives Assets (Liabilities) Member | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |
Total realized gains (losses) |  |  |  |  |
Assets and (liabilities) at fair value | $ 20,027 | [1] |  | $ 4,427 | [1]
[1] | See "Note 11. Derivative Instruments" for additional information related to the fair value by type of contract, of derivatives entered into by the Company.

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- Definition Assets (Liabilities), Fair Value Disclosure, Recurring + References No definition available. + Details
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- Definition This item represents the amount of the total foreign exchange gains or losses for the period which are included in the statement of income in net foreign exchange gains or losses. Such foreign exchange gains or losses relate to those assets or liabilities still held at the reporting date for which fair value is measured on a recurring basis using significant unobservable inputs (Level 3). + References No definition available. + Details
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- Definition This item represents the amount of the total change in unrealized (holding) gains or losses for the period which are included in the statement of income (or changes in net assets) in investment income. The fair value of which assets was or is measured on a recurring basis using significant unobservable inputs (Level 3). + References No definition available. + Details
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- Definition This item represents the amount of the total change in unrealized (holding) gains or losses for the period which are included in the statement of income (or changes in net assets) in other income. The fair value of which assets was or is measured on a recurring basis using significant unobservable inputs (Level 3). + References No definition available. + Details
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- Definition This item represents the amount of the total realized gains or losses for the period which are included in the statement of income (or changes in net assets) in other income. The fair value of which assets was or is measured on a recurring basis using significant unobservable inputs (Level 3). + References No definition available. + Details
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- Definition Estimated percentage return for the period on fair value at beginning of period. + References No definition available. + Details
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- Definition Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Reclassified from Other Assets + References No definition available. + Details
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- Definition Total Other Assets And liabilities Measured on Recurring Basis + References No definition available. + Details
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- Definition This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a recurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References No definition available. + Details
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- Definition This item represents the amount of the total change in unrealized (holding) gains or losses for the period which are included in the statement of income (or changes in net assets) in investment income. Such unrealized (holding) gains or losses relate to those assets still held at the reporting date for which fair value is measured on a recurring basis using significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph d -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. + Details
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- Definition This item represents the amount of the total change in unrealized (holding) gains or losses for the period which are included in the statement of income (or changes in net assets) in other income. Such unrealized (holding) gains or losses relate to those assets still held at the reporting date for which fair value is measured on a recurring basis using significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph d -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. + Details
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- Definition Expected dividends to be paid to holders of the underlying shares or financial instruments (expressed as a percentage of the share or instrument's price). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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- Definition Risk-free interest rate assumption used in valuing an instrument. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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- Definition Adjustment to the discount rate used to measure fair value for lack of ability to convert business interests into cash quickly. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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- Definition Risk associated with risk of default, credit spread risk and downgrade risk, expressed as a percentage, used as an input to measure fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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- Definition Purchases that have taken place during the period in relation to assets measured at fair value and categorized within Level 3 of the fair value hierarchy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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- Definition Sales that have taken place during the period in relation to assets measured at fair value and categorized within Level 3 of the fair value hierarchy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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- Definition Settlements that have taken place during the period in relation to assets measured at fair value and categorized within Level 3 of the fair value hierarchy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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- Definition This element represents [net] transfers in to and out of assets measured at fair value on a recurring basis using unobservable inputs (Level 3) which have taken place during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph c(3) -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. + Details
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- Definition This element represents an asset measured at fair value using significant unobservable inputs (Level 3) which is required for reconciliation purposes of beginning and ending balances. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -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. + Details
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