Estimated Fair Values Estimated Fair Values (Fair Value Option) (Details) - Loans Held For Sale - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Fair Value, Option, Quantitative Disclosures [Line Items]
Gains (Losses) From Fair Value Changes	$ (51)	$ 1,347	$ 1,588	$ 1,316
Fair Value Of Items For Which Fair Value Option Was Elected Assets	95,910		95,910		$ 59,766
Aggregate Unpaid Principal Balance Of Items For Which Fair Value Option Was Elected Assets	93,447		93,447		58,890
Fair Value Option Aggregate Difference Assets	$ 2,463		$ 2,463		$ 876