Accumulated Other Comprehensive Loss (Schedule Of Amounts Reclassified Out of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Reclassifications Out Of Accumulated Other Comprehensive Income [Line Items]
Related income tax expense	$ (5,129)	$ (6,010)	$ (22,621)	$ (18,310)
Other comprehensive income (loss), net of tax	1,332	(412)	599	2,069
Accumulated Net Unrealized Investment Gain (Loss) [Member] | Reclassification Out Of Accumulated Other Comprehensive Income [Member]
Reclassifications Out Of Accumulated Other Comprehensive Income [Line Items]
Net securities gains reclassified into earnings	0	(71)	(2,130)	(972)
Related income tax expense	0	26	786	358
Other comprehensive income (loss), net of tax	$ 0	$ (45)	$ (1,344)	$ (614)