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Accumulated Other Comprehensive Income (Accumulated Comprehensive Income, net of income tax) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Accumulated Other Comprehensive Income [Line Items]      
Unrealized loss on securities available-for-sale which are other-than-temporarily impaired $ 0 $ 3,172 $ 0
Accumulated other comprehensive income, net of tax, Total 1,596 13,997  
Accumulated Other Comprehensive Income (Loss) [Member]      
Accumulated Other Comprehensive Income [Line Items]      
Accumulated other comprehensive income, net of tax, Total 1,596 13,997  
AccumulatedOtherThanTemporaryImpairmentMember      
Accumulated Other Comprehensive Income [Line Items]      
Unrealized gain on securities available-for-sale which are not other-than-temporarily impaired 1,617 22,044  
Unrealized loss on securities available-for-sale which are other-than-temporarily impaired 0 3,196  
Income tax effect of unrealized gain on securities available-for-sale 592 (1,924)  
Net unrealized gain on securities available for sale wich are not other than temporarily impaired 2,209 16,924  
Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges [Member]      
Accumulated Other Comprehensive Income [Line Items]      
Unrealized loss on cash flow hedges (1,004) (4,307)  
Income tax effect of unrealized loss on cash flow hedges 391 1,380  
Net unrealized (loss) income on cash flow hedges $ (613) $ (2,927)