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Investments (Components Of Net Realized Gains, Excluding OTTI Charges) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items] |  |  |  |  |  |  |  |  |  |  |
HTM fixed income securities gains |  |  |  |  |  |  |  |  | $ 5 | $ 2 | $ 195
HTM fixed income securities losses |  |  |  |  |  |  |  |  | (1) | (20) | (95)
Other investment securities gains |  |  |  |  |  |  |  |  | 162 | 1 | 0
Other investment securities losses |  |  |  |  |  |  |  |  | (653) | 0 | (1,060)
Net realized investment gains | $ (2,600) | $ 308 | $ (3,420) | $ 18,883 | $ (389) | $ 15,231 | $ 4,539 | $ 7,218 | 31,537 | 37,703 | 26,375
Proceeds from sale of available-for-sale securities |  |  |  |  |  |  |  |  | 234,100 | 259,000 | 135,900
Fixed Income Securities [Member] |  |  |  |  |  |  |  |  |  |  |
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items] |  |  |  |  |  |  |  |  |  |  |
AFS securities gains |  |  |  |  |  |  |  |  | 4,515 | 1,945 | 3,340
AFS securities losses |  |  |  |  |  |  |  |  | (312) | (392) | (373)
Equity Securities [Member] |  |  |  |  |  |  |  |  |  |  |
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items] |  |  |  |  |  |  |  |  |  |  |
AFS securities gains |  |  |  |  |  |  |  |  | 29,168 | 36,871 | 24,776
AFS securities losses |  |  |  |  |  |  |  |  | $ (1,347) | $ (704) | $ (408)

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