Other Comprehensive Income (Loss) (Summary Of Accumulated Other Comprehensive Income (Loss), Net Of Tax) (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Other Comprehensive Income (Loss) [Abstract]
Beginning Balance	$ 1,160		$ (1,247)	$ (1,560)		$ 19	$ (1,247)	$ 19
Other comprehensive income (loss) before reclassifications	153			(619)			2,560	(2,198)
Other comprehensive income (loss), net of tax	153	$ 809	$ 1,598	(619)	$ (290)	$ (1,289)	2,560	(2,198)
Ending Balance	$ 1,313	$ 1,160		$ (2,179)	$ (1,560)		$ 1,313	$ (2,179)