Loans (Details 10) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Purchase Credit Impaired Loans Receivable, Carrying Amount [Abstract]    
Carrying amount $ 37,284 $ 61,876
Total outstanding amount 42,679 72,910
Purchase Credit Impaired Loans, Reconciliation of Income Expected to be Collected [Roll Forward]    
Beginning balance 2,188 3,343
Accretion of income (2,162) (2,683)
Other activity, net 1,623 1,528
Ending balance 1,649 2,188
Commercial    
Purchase Credit Impaired Loans Receivable, Carrying Amount [Abstract]    
Carrying amount 23,005 40,060
Construction    
Purchase Credit Impaired Loans Receivable, Carrying Amount [Abstract]    
Carrying amount 3,866 8,769
Consumer    
Purchase Credit Impaired Loans Receivable, Carrying Amount [Abstract]    
Carrying amount 8,507 9,997
Mortgage    
Purchase Credit Impaired Loans Receivable, Carrying Amount [Abstract]    
Carrying amount $ 1,906 $ 3,050