Other Comprehensive Income (Loss) (Summary Of Tax Expense (Benefit) Of Other Comprehensive Income (Loss)) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Other Comprehensive Income (Loss), Tax [Abstract]
Net holding gains (losses) arising during the period	$ 97,681	$ (77,471)	$ 173,204	$ 8,075
Change in unrealized other-than-temporary impairment losses on fixed maturities arising during the period	5	(21)	569	54
Reclassification adjustments for net gains included in net income	(1,523)	(3,536)	(3,677)	(9,198)
Change in net unrealized gains on investments	96,163	(81,028)	170,096	(1,069)
Change in foreign currency translation adjustments	1,124	0	1,466	38
Change in net actuarial pension loss	81	109	161	219
Total	$ 97,368	$ (80,919)	$ 171,723	$ (812)