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Investments (Fair Value Below Amortized Cost of Gross Unrealized Losses for Fixed Maturity and Equity Securities) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012
Gross unrealized losses with number of securities [Line Items] |  |
Available-for-sale Securities, Gross Unrealized Losses | $ 324,600 | $ 133,558
Percentage Of Total Gross Unrealized Losses | 100.00% | 100.00%
Less Than 20 Percent [Member] |  |
Gross unrealized losses with number of securities [Line Items] |  |
Available-for-sale Securities, Gross Unrealized Losses | 296,731 | 54,951
Percentage Of Total Gross Unrealized Losses | 91.40% | 41.20%
More Than Or Equal To 20 Percent For Less Than Six Months [Member] |  |
Gross unrealized losses with number of securities [Line Items] |  |
Available-for-sale Securities, Gross Unrealized Losses | 6,444 | 734
Percentage Of Total Gross Unrealized Losses | 2.00% | 0.50%
More Than Or Equal To 20 Percent For Six Months Or Greater [Member] |  |
Gross unrealized losses with number of securities [Line Items] |  |
Available-for-sale Securities, Gross Unrealized Losses | $ 21,425 | $ 77,873
Percentage Of Total Gross Unrealized Losses | 6.60% | 58.30%

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- Definition Amount of unrealized loss before deducting unrealized gain on investments in available-for-sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 + Details
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