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The net realized gains or losses on investments during the period, not including gains or losses on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity.

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Investments (Summary Of Components Of Net Realized Capital Gains (Losses)) (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 Securities [Line Items]
Other-than-temporary impairments									$ (102,199)	$ (39,502)	$ (1,052)
Total net realized capital gains (losses)	$ 10,507	$ (159,971)	$ (24,178)	$ (10,505)	$ 13,352	$ (9,448)	$ 59,016	$ 21,126	(184,147)	84,046	300,227
Fixed Maturity Securities [Member] \| Market Value [Member]
Schedule of Available-for-sale Securities [Line Items]
Other-than-temporary impairments									(102,199)	(39,502)	(1,052)
Gains (losses) from sales									(22,310)	4,408	6,792
Fixed Maturity Securities [Member] \| Fair Value [Member]
Schedule of Available-for-sale Securities [Line Items]
Gains (losses) from sales									24	(3,137)	201
Gains (losses) from fair value adjustments									(44)	(1,498)	307
Equity Securities [Member] \| Market Value [Member]
Schedule of Available-for-sale Securities [Line Items]
Gains (losses) from sales									(6,702)	426	2,648
Equity Securities [Member] \| Fair Value [Member]
Schedule of Available-for-sale Securities [Line Items]
Gains (losses) from sales									(7,305)	156	32,747
Gains (losses) from fair value adjustments									(45,627)	123,196	258,569
Short-Term Investments And Cash [Member] \| Fair Value [Member]
Schedule of Available-for-sale Securities [Line Items]
Gains (losses) from sales									$ 16	$ (3)	$ 15