Basis Of Presentation (Details) (USD $) In Thousands, unless otherwise specified			3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011 Scenario, Potential Previous Expense [Member]	Sep. 30, 2011 Scenario, Potential Previous Expense [Member]	Sep. 30, 2012 Authoritative Guidance [Member]	Sep. 30, 2012 Authoritative Guidance [Member]
Item Effected [Line Items]
Deferred acquisition costs	$ 90,088	$ 166,806			$ 7,215	$ 7,215
Expensed deferrable acquisition costs			$ 2,789	$ 6,160	$ 1,356	$ 4,727