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, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Mortgage loans held for sale	$ (249)	$ 878	$ 954	$ 1,850
Fair value	61,893		61,893		$ 51,545
Unpaid principal balance	60,508		60,508		51,114
Fair value less aggregate unpaid principal balance	$ 1,385		$ 1,385		$ 431