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Acquisitions Infinity Franchise Holdings Acquisition (Details)
$ / shares in Units, $ in Thousands
Jan. 30, 2014
USD ($)
entity
$ / shares
shares
Jun. 30, 2015
USD ($)
Dec. 31, 2014
USD ($)
Jun. 30, 2014
USD ($)
Acquisitions        
Delinquent loans or adversely classified assets   $ 4,382 $ 1,444 $ 1,941
Goodwill   50,832 $ 22,950 $ 22,950
Total purchase credit impaired loans   $ 5,776    
Infinity Franchise Holdings Acquisition        
Acquisitions        
Consideration paid $ 17,360      
Cash consideration $ 8,300      
Number of shares of common stock issued as consideration | shares 562,469      
Stock price of the acquired entity (in dollars per share) | $ / shares $ 16.02      
Period prior to announcement of the transaction for which average closing price is considered to calculate value of shares to be issued (in days) 10 days      
Delinquent loans or adversely classified assets $ 0      
Goodwill $ 5,522      
Number of entities in business combination | entity 2      
Total purchase credit impaired loans $ 0