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Loans (Loans Acquired With Deterioration of Credit Quality) (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Purchased credit impaired loans    
Carrying Amount $ 20,581 $ 26,524
Total loans    
Purchased credit impaired loans    
Outstanding Balance 29,591 36,431
Commercial real estate    
Purchased credit impaired loans    
Outstanding Balance 8,235 11,476
Commercial and industrial    
Purchased credit impaired loans    
Outstanding Balance 818 1,573
Residential real estate    
Purchased credit impaired loans    
Outstanding Balance 20,497 23,306
Consumer, other    
Purchased credit impaired loans    
Outstanding Balance $ 41 $ 76