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Condensed Financial Information of Registrant (Schedule Of Condensed Financial Information Of Registrant, Statements Of Cash Flow) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Cash flows from operating activities: |  |  |
Net cash provided by (used in) operating activities | $ 190,244 | $ 246,535 | $ 209,804
Equity securities available for sale in nature |  |  |
Purchases | (965,701) | (542,494) | (831,796)
Sales | 805,417 | 745,058 | 872,997
(Decrease) in payable for securities, net | (1,387) | 9,294 | 1,702
Business acquisition, net of cash acquired | 7,771 | 0 | 0
Other, net | 2,473 | 3,472 | 1,741
Net cash used in investing activities | (81,682) | (194,035) | (18,351)
Cash flows from financing activities: |  |  |
Dividends paid to shareholders | (136,386) | (135,496) | (134,776)
Excess tax benefit from exercise of stock options | 27 | 148 | 202
Proceeds from stock options exercised | 2,111 | 6,247 | 1,446
Proceeds from bank loan | 0 | 100,000 | 50,000
Net cash used in financing activities | (134,248) | (29,101) | (83,128)
Net increase (decrease) in cash | (25,686) | 23,399 | 108,325
Cash: |  |  |
Beginning of year | 289,907 | 266,508 | 158,183
End of year | 264,221 | 289,907 | 266,508
SUPPLEMENTAL CASH FLOW DISCLOSURE |  |  |
Interest paid | 2,989 | 2,543 | 998
Income taxes paid (received) | 31,390 | 61,139 | 16,503
Parent Company [Member] |  |  |
Cash flows from operating activities: |  |  |
Net cash provided by (used in) operating activities | 548 | (3,434) | (843)
Cash flows from investing activities: |  |  |
Capital contribution to subsidiaries | (90,125) | (30,125) | (40,125)
Distributions received from special purpose entities | 8,883 | 6,756 | 0
Dividends received from subsidiaries | 133,000 | 225,000 | 120,000
Purchases of fixed maturity securities available for sale in nature | (571) | 0 | 0
Equity securities available for sale in nature |  |  |
Purchases | (146,236) | (254,572) | (25,038)
Sales | 192,005 | 90,422 | 25,798
(Decrease) in payable for securities, net | 0 | (2,489) | 2,489
Net decrease in short-term investments | (8,612) | (1,346) | (36,085)
Business acquisition, net of cash acquired | (6,000) | 0 | 0
Other, net | 1,945 | 2,191 | 895
Net cash used in investing activities | 101,513 | 38,529 | 120,104
Cash flows from financing activities: |  |  |
Dividends paid to shareholders | (136,386) | (135,496) | (134,776)
Excess tax benefit from exercise of stock options | 27 | 148 | 202
Proceeds from stock options exercised | 2,111 | 6,247 | 1,446
Proceeds from bank loan | 0 | 100,000 | 50,000
Net cash used in financing activities | (134,248) | (29,101) | (83,128)
Net increase (decrease) in cash | (32,187) | 5,994 | 36,133
Cash: |  |  |
Beginning of year | 52,326 | 46,332 | 10,199
End of year | 20,139 | 52,326 | 46,332
SUPPLEMENTAL CASH FLOW DISCLOSURE |  |  |
Interest paid | 2,153 | 1,757 | 318
Income taxes paid (received) | $ 1,807 | $ 2,112 | $ (827)

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