Fair Value Accounting (Changes In Fair Value Included In Consolidated Statements Of Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Fair Value Disclosures [Abstract]
Mortgage loans held for sale	$ (742)	$ 1,399	$ (5,566)
Fair value	59,275	63,328	45,384
Unpaid principal balance	58,177	61,488	44,943
Fair value less aggregate unpaid principal balance	$ 1,098	$ 1,840	$ 441