v2.3.0.15

Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands | Sep. 30, 2011 | Dec. 31, 2010
--- | --- | ---
Consolidated Balance Sheets |  |
Fixed maturity investments trading, Amortized cost | $ 3,671,728 | $ 3,859,442
Fixed maturity investments available for sale, Amortized cost | 139,283 | 225,549
Equity investments trading, Cost | $ 47,996 |

X
- Definition This item represents the total of all debt securities classified as trading, at cost, net of adjustments made for accretion, amortization and collection of cash, if any. + Details
Name: | rnr_AmortizedCostOfFixedMaturitiesTrading
Namespace Prefix: | rnr
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the cost of debt securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + Details
Name: | us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis
Namespace Prefix: | us-gaap
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_StatementOfFinancialPositionAbstract
Namespace Prefix: | us-gaap
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition This item represents a parenthetical disclosure for the cost of securities classified as trading. + Details
Name: | us-gaap_TradingSecuritiesCost
Namespace Prefix: | us-gaap
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant