Summary Of Significant Accounting Policies (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			6 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2013	Sep. 30, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Item Effected [Line Items]
Distribution of limited partnership income	$ 2,683	$ 5,933	$ 10,252	$ 16,185	$ 18,868	$ 24,133	$ 19,490	$ 41,249
Minimum percent of prepaid reinsurance premiums for any foreign reinsurers that were collateralized						10.00%
Deferred acquisition costs						112,024	97,522
Expensed deferrable acquisition costs						293,922	310,699	338,655
Amount of deferred acquisition costs for prior year if guidance had been applicable								7,462
Scenario, Potential Previous Expense [Member]
Item Effected [Line Items]
Expensed deferrable acquisition costs						1,397
Authoritative Guidance [Member]
Item Effected [Line Items]
Deferred acquisition costs						7,215
Expensed deferrable acquisition costs							$ 5,818