Fair Value Measurement (Summary Of Changes In Fair Value Of Level 3 Financial Assets And Financial Liabilities Held At Fair Value) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Collateralized Debt Obligations [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	$ 42,801	$ 47,503
Realized gains (losses) included in earnings	740	7,975
Purchase	0	25,000
Sales	(30,975)	(37,677)
Settlements	(8,264)	0
Ending Balance	4,302	42,801
The amount of total gains (losses) for period included in earnings attributable to assets still held at December 31	321	(3,017)
Partnership Interest in a Private Credit Fund [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	11,306	10,008
Realized gains (losses) included in earnings	1,242	1,298
Purchase	0	0
Sales	0	0
Settlements	0	0
Ending Balance	12,548	11,306
The amount of total gains (losses) for period included in earnings attributable to assets still held at December 31	$ 1,242	$ 1,298