Fair Value Accounting (Changes In Fair Value Included In Consolidated Statements Of Income) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Fair Value Disclosures [Abstract]
Mortgage loans held for sale	$ 971	$ 410
Aggregate fair value	62,867		$ 59,275
Unpaid principal balance	60,798		58,177
Fair value less aggregate unpaid principal balance	$ 2,069		$ 1,098