Loans and the Allowance for Loan Losses (Details 8) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	$ 375,055		$ 448,930
Impaired Covered Loans
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	13,240		24,519
Other Covered Loans
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	142,079		157,155
Not Covered Loans
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	219,736		267,256
Commercial, financial, agricultural
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	25,696		35,484
Commercial, financial, agricultural | Impaired Covered Loans
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	0		0
Commercial, financial, agricultural | Other Covered Loans
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	7,699		9,546
Commercial, financial, agricultural | Not Covered Loans
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	17,997		25,938
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	1,768		2,885
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	1,648		1,648
Real estate – construction | Not Covered Loans
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	120		1,237
Real estate – 1-4 family mortgage
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	86,864		102,562
Real estate – 1-4 family mortgage | Impaired Covered Loans
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	1,254		835
Real estate – 1-4 family mortgage | Other Covered Loans
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	45,100		53,631
Real estate – 1-4 family mortgage | Not Covered Loans
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	40,510		48,096
Real estate – commercial mortgage
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	256,324		301,190
Real estate – commercial mortgage | Impaired Covered Loans
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	11,986		23,684
Real estate – commercial mortgage | Other Covered Loans
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	87,594		92,302
Real estate – commercial mortgage | Not Covered Loans
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	156,744		185,204
Installment loans to individuals
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	4,403	[1]	6,809	[1]
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	38		28
Installment loans to individuals | Not Covered Loans
Loans acquired with deteriorated credit quality
Acquired with deteriorated credit quality	$ 4,365		$ 6,781

[1] Includes lease financing receivables.