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Condensed Financial Information of Registrant (Schedule Of Condensed Financial Information Of Registrant, Statements Of Cash Flow) (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Cash flows from operating activities: |  |  |
Net cash provided by operating activities | $ 1,037,117,000 | $ 453,004,000 | $ 352,589,000
Cash flows from investing activities: |  |  |
Capital contribution to subsidiaries |  |  | 0
Capital distribution from subsidiaries | 300,000 | 6,200,000 | 2,900,000
Fixed maturity securities available for sale in nature: |  |  |
Purchases | (1,720,986,000) | (784,752,000) | (1,794,817,000)
Sales | 171,432,000 | 276,805,000 | 856,291,000
Calls or maturities | 940,858,000 | 294,309,000 | 480,023,000
Equity securities available for sale in nature: |  |  |
Purchases | (1,663,525,000) | (1,356,493,000) | (1,042,913,000)
Sales | 1,550,229,000 | 1,356,132,000 | 1,154,523,000
Other, net | 11,411,000 | 10,377,000 | 5,749,000
Net cash provided by (used in) investing activities | (796,656,000) | (295,453,000) | (316,384,000)
Cash flows from financing activities: |  |  |
Dividends paid to shareholders | (70,326,000) | (70,322,000) | (105,482,000)
Proceeds from stock options exercised | 752,000 | 0 | 0
Proceeds from bank loan | 0 | 175,000,000 | 25,000,000
Net cash (used in) provided by financing activities | (71,107,000) | 103,576,000 | (81,986,000)
Net increase (decrease) in cash | 169,354,000 | 261,127,000 | (45,781,000)
Cash: |  |  |
Beginning of year | 550,903,000 | 289,776,000 | 335,557,000
End of year | 720,257,000 | 550,903,000 | 289,776,000
SUPPLEMENTAL CASH FLOW DISCLOSURE |  |  |
Interest paid | 30,077,000 | 23,000,000 | 16,665,000
Income taxes (refunded) paid, net | 94,935,000 | (57,853,000) | (26,542,000)
Parent Company |  |  |
Cash flows from operating activities: |  |  |
Net cash provided by operating activities | (28,137,000) | (14,703,000) | 225,000
Cash flows from investing activities: |  |  |
Capital contribution to subsidiaries | (165,000) | (150,000,000) | 0
Capital distribution from subsidiaries | 0 | 0 | 3,431,433
Distributions received from special purpose entities | 300,000 | 6,210,000 | 2,904,000
Dividends received from subsidiaries | 100,000,000 | 0 | 0
Fixed maturity securities available for sale in nature: |  |  |
Purchases | 0 | 0 | (11,905,000)
Sales | 5,000,000 | 0 | 1,000,000
Calls or maturities | 5,000,000 | 955,000 | 0
Equity securities available for sale in nature: |  |  |
Purchases | (2,399,000) | (1,172,000) | (5,307,000)
Sales | 4,057,000 | 25,848,000 | 48,215,000
Decrease (increase) in short-term investments | 493,000 | 26,481,000 | (6,268,000)
Other, net | 43,000 | 183,000 | 667,000
Net cash provided by (used in) investing activities | 112,329,000 | (91,495,000) | 32,737,000
Cash flows from financing activities: |  |  |
Dividends paid to shareholders | (70,326,000) | (70,322,000) | (105,482,000)
Proceeds from stock options exercised | 752,000 | 0 | 0
Proceeds from bank loan | 0 | 175,000,000 | 25,000,000
Net cash (used in) provided by financing activities | (69,574,000) | 104,678,000 | (80,482,000)
Net increase (decrease) in cash | 14,618,000 | (1,520,000) | (47,520,000)
Cash: |  |  |
Beginning of year | 4,698,000 | 6,218,000 | 53,738,000
End of year | 19,316,000 | 4,698,000 | 6,218,000
SUPPLEMENTAL CASH FLOW DISCLOSURE |  |  |
Interest paid | 30,009,000 | 22,959,000 | 16,611,000
Income taxes (refunded) paid, net | $ (7,075,000) | $ 1,630,000 | $ (14,102,000)

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