Fair Value Accounting (Changes In Fair Value Included In Consolidated Statements Of Income) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Fair Value Disclosures [Abstract]
Mortgage loans held for sale	$ 878	$ (973)	$ 1,850	$ (563)
Aggregate fair value	87,824		87,824		$ 59,275
Unpaid principal balance	84,877		84,877		58,177
Fair value less aggregate unpaid principal balance	$ 2,947		$ 2,947		$ 1,098