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Condensed Financial Information Of Registrant (Schedule Of Condensed Financial Information Of Registrant, Statements Of Cash Flow) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Cash flows from operating activities: |  |  |
Net cash (used in) provided by operating activities | $ 158,525 | $ 91,781 | $ 189,025
Fixed maturities: |  |  |
Calls or maturities | 418,616 | 285,454 | 218,037
Equity securities: |  |  |
Purchases | (379,963) | (432,869) | (430,692)
Sales | 325,562 | 240,764 | 337,018
Calls | 0 | 4,826 | 0
Net decrease in payable for securities | (9,137) | 10,763 | 1,192
Net (increase) decrease in short-term investments | (93,737) | 12,815 | 48,718
Other, net | 12,026 | 6,868 | 2,690
Net cash provided by (used in) investing activities | 124,615 | 33,100 | (31,697)
Cash flows from financing activities: |  |  |
Dividends paid to shareholders | (132,142) | (129,863) | (127,617)
Excess tax benefit from exercise of stock options | 56 | 132 | 5
Proceeds from stock options exercised | 1,951 | 733 | 393
Net cash used in financing activities | (253,135) | (128,998) | (7,219)
Net increase (decrease) in cash | 30,005 | (4,117) | 150,109
Cash: |  |  |
Beginning of year | 181,388 | 185,505 | 35,396
End of year | 211,393 | 181,388 | 185,505
Parent Company [Member] |  |  |
Cash flows from operating activities: |  |  |
Net cash (used in) provided by operating activities | (312) | (4,441) | 19,094
Cash flows from investing activities: |  |  |
Dividends from subsidiaries | 270,000 | 128,000 | 110,000
Fixed maturities: |  |  |
Calls or maturities |  | 265 | 320
Equity securities: |  |  |
Purchases | (50,056) | (836) | (8,021)
Sales | 43,520 | 2,070 | 6,486
Calls |  | 895 |
Net decrease in payable for securities |  |  | (1,719)
Net (increase) decrease in short-term investments | (21,451) | (583) | 47,274
Other, net | 1,047 | (110) | (3,260)
Net cash provided by (used in) investing activities | 243,060 | 129,701 | 151,080
Cash flows from financing activities: |  |  |
Dividends paid to shareholders | (132,142) | (129,863) | (127,617)
Excess tax benefit from exercise of stock options | 56 | 132 | 5
Proceeds from stock options exercised | 1,951 | 733 | 393
Payment to retire senior notes | (125,000) |  |
Net cash used in financing activities | (255,135) | (128,998) | (127,219)
Net increase (decrease) in cash | (12,387) | (3,738) | 42,955
Cash: |  |  |
Beginning of year | 41,606 | 45,344 | 2,389
End of year | $ 29,219 | $ 41,606 | $ 45,344

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- Definition The cash outflow for a long-term debt where the holder has highest claim on the entity's asset in case of bankruptcy or liquidation during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 -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 Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 20 -Subparagraph b -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 FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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