Deferred Policy Acquisition Costs (Movement Analysis Of Deferred Policy Acquisition Costs) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Deferred Policy Acquisition Costs	$ 3,392,437	$ 3,342,575	$ 3,517,796
Deferred Policy Acquisition Costs, Additions	350,233	352,260	877,609
Deferred Policy Acquisition Cost, Amortization Expense	(341,115)	(288,630)	(867,621)
Deferred Policy Acquisition Cost, Amortization Expense, Other	(40,077)	58,754	(111,744)
Deferred Policy Acquisition Cost, Amortization Expense, Unrealized Investment Gains (Losses)	(3,541)	17,510	(4,480)
Deferred Policy Acquisition Cost, Foreign Currency Translation Adjustment	(19,332)	(90,032)	(68,985)
Deferred Policy Acquisition Costs	$ 3,338,605	$ 3,392,437	$ 3,342,575