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Accumulated Other Comprehensive Income (Accumulated Comprehensive Income, net of income tax) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Accumulated Other Comprehensive Income [Line Items]      
Unrealized loss on securities available-for-sale which are other-than-temporarily impaired $ (3,172) $ 0 $ 0
Accumulated other comprehensive income, net of tax, Total 13,997 19,711  
Accumulated Other Comprehensive Income (Loss) [Member]      
Accumulated Other Comprehensive Income [Line Items]      
Accumulated other comprehensive income, net of tax, Total 13,997 19,711  
AccumulatedOtherThanTemporaryImpairmentMember      
Accumulated Other Comprehensive Income [Line Items]      
Unrealized gain on securities available-for-sale which are not other-than-temporarily impaired 22,044 28,743  
Unrealized loss on securities available-for-sale which are other-than-temporarily impaired (3,196)    
Income tax effect of unrealized gain on securities available-for-sale 1,924 2,978  
Net unrealized gain on securities available for sale wich are not other than temporarily impaired 16,924 25,765  
Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges [Member]      
Accumulated Other Comprehensive Income [Line Items]      
Unrealized loss on cash flow hedges (4,307) (8,585)  
Income tax effect of unrealized loss on cash flow hedges 1,380 2,531  
Net unrealized (loss) income on cash flow hedges $ (2,927) $ (6,054)