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Investment Securities (Proceeds From Sales Of Securities And Components Of Investment Securities Gains And Losses) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Investment [Line Items]        
Proceeds from Sale and Maturity of Available-for-sale Securities     $ 4,972 $ 0
Proceeds from sales of non-marketable securities     1,580 2,071
Total proceeds [1]     6,552 2,071
Investment securities gains (losses), net $ 1,651 $ (744) 879 [1] (1,739) [1]
Available-for-sale Securities [Member]        
Investment [Line Items]        
Loss Realized on Called Bond     (254) 0
Available-for-sale Securities, Gross Realized Losses     (22) 0
Gain realized on donation     4,315 0
Other-than-temporary impairment recognized on debt securities     (320) (270)
Non-Marketable [Member]        
Investment [Line Items]        
Gains realized on sales     642 2,260
Nonmarketable Securities Loss On Sale     (652) 0
Fair value adjustments, net     $ (2,830) $ (3,729)
[1] Available for sale and non-marketable securities