Accumulated Other Comprehensive Loss (Schedule Of Amounts Reclassified Out of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Reclassifications Out Of Accumulated Other Comprehensive Income [Line Items]
Related income tax expense	$ (5,866)	$ (11,367)
Other comprehensive income (loss), net of tax	2,743	906
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	(14)
Related income tax expense	0	5
Other comprehensive income (loss), net of tax	$ 0	$ (9)