Loans and the Allowance for Loan Losses (Details 7) - Receivables Acquired with Deteriorated Credit Quality - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	$ 336,165	$ 344,425
Impaired Covered Loans
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	22,848	8,004
Other Covered Loans
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	44,125	135,037
Not Covered Loans
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	269,192	201,384
Commercial, financial, agricultural
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	16,489	23,404
Commercial, financial, agricultural | Impaired Covered Loans
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	1,370	0
Commercial, financial, agricultural | Other Covered Loans
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	389	6,684
Commercial, financial, agricultural | Not Covered Loans
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	14,730	16,720
Lease financing
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	0	0
Lease financing | Impaired Covered Loans
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	0	0
Lease financing | Other Covered Loans
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	0	0
Lease financing | Not Covered Loans
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	0	0
Real estate – construction
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	2,749	0
Real estate – construction | Impaired Covered Loans
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	0	0
Real estate – construction | Other Covered Loans
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	91	0
Real estate – construction | Not Covered Loans
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	2,658	0
Real estate – 1-4 family mortgage
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	91,649	82,819
Real estate – 1-4 family mortgage | Impaired Covered Loans
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	6,358	420
Real estate – 1-4 family mortgage | Other Covered Loans
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	24,996	43,597
Real estate – 1-4 family mortgage | Not Covered Loans
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	60,295	38,802
Real estate – commercial mortgage
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	222,610	234,245
Real estate – commercial mortgage | Impaired Covered Loans
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	15,120	7,584
Real estate – commercial mortgage | Other Covered Loans
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	18,606	84,720
Real estate – commercial mortgage | Not Covered Loans
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	188,884	141,941
Installment loans to individuals
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	2,668	3,957
Installment loans to individuals | Impaired Covered Loans
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	0	0
Installment loans to individuals | Other Covered Loans
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	43	36
Installment loans to individuals | Not Covered Loans
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	$ 2,625	$ 3,921