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	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Collateralized Debt Obligations [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance				$ 4,302
Realized (losses) gains included in earnings				755
Reclassification from other assets				0
Sales				(3,547)
Settlement				0
Ending Balance		$ 0		0
The amount of total (losses) gains for the period included in earnings attributable to assets still held at June 30				0
Partnership Interest In Private Credit Fund [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance	$ 15,432	12,726	$ 11,719	12,548
Realized (losses) gains included in earnings	1,663	(240)	861	(418)
Reclassification from other assets			2,911	0
Sales			0	0
Settlement	(24)	0	(24)	0
Ending Balance	13,745	12,966	13,745	12,966
The amount of total (losses) gains for the period included in earnings attributable to assets still held at June 30	$ (1,663)	$ 240	$ (861)	$ 418