Investments (Summary Of Components Of Net Investment Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Gross investment income before adjustments	$ 127,805	$ 150,606
Funds held interest income (expense)	3,017	4,429
Future policy benefit reserve income (expense)	(303)	(531)
Gross investment income	130,519	154,504
Investment expenses	(7,362)	(8,723)
Net investment income	123,157	145,781
Fixed Maturity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross investment income before adjustments	116,253	120,757
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross investment income before adjustments	11,459	9,741
Short-Term Investments And Cash [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross investment income before adjustments	330	304
Limited Partnerships [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross investment income before adjustments	(2,258)	17,483
Other [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross investment income before adjustments	$ 2,021	$ 2,321