Realized and Unrealized Investment Gains (Losses) (Change in Unrealized Gains (Losses) of Available For Sales Securities) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2012	Jun. 30, 2011	Mar. 31, 2011	Jun. 30, 2012
Financing Receivable, Allowance for Credit Losses, Period Increase (Decrease)	$ 123	$ 0	$ 0	$ 6,773
Change in unrealized gains (losses) before income taxes and noncontrolling interests	60,159	119,607	81,553	94,596
Income tax expense	(20,624)	(41,672)	(28,625)	(33,037)
Noncontrolling interests	(5)	(68)	(12)	(28)
Total change in unrealized gains	39,530	77,867	52,916	61,531
Fixed Maturities Securities [Member]
Change in unrealized gains (losses) before income taxes and noncontrolling interests	71,138	101,205	71,918	90,560
Non-Credit Portion of OTTI Recognized In Other Comprehensive Income [Member]
Change in unrealized gains (losses) before income taxes and noncontrolling interests	190	(900)	(656)	1,933
Equity Securities Available For Sale [Member]
Change in unrealized gains (losses) before income taxes and noncontrolling interests	(8,518)	18,486	6,101	3,077
Investment Funds [Member]
Change in unrealized gains (losses) before income taxes and noncontrolling interests	$ (2,651)	$ 816	$ 4,190	$ (974)

This item represents the tax effects occurring during the period which are related to the net unrealized gain (loss) resulting from changes in the fair [carrying] value during the period of available-for-sale securities. Such tax affects would have been charged or credited directly to other comprehensive income or to related components of shareholders' equity.

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Gross appreciation or the gross loss in value of the total unsold securities, after tax, attributable to noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 51

-Paragraph 30

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

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-Paragraph 38

-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.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 51

-Paragraph 29

-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 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 45

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=6921628&loc=SL4569643-111683

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