Loans and the Allowance for Loan Losses (Details 11) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Investment in loans, net of unearned income on impairment methodology
Individually evaluated for impairment	$ 56,924		$ 64,868
Collectively evaluated for impairment	3,375,164		2,497,356
Acquired with deteriorated credit quality	448,930		248,029
Loans, net of unearned income	3,881,018		2,810,253
Commercial, financial, agricultural
Investment in loans, net of unearned income on impairment methodology
Individually evaluated for impairment	743		1,620
Collectively evaluated for impairment	432,736		304,290
Acquired with deteriorated credit quality	35,484		11,140
Loans, net of unearned income	468,963		317,050
Real estate – construction
Investment in loans, net of unearned income on impairment methodology
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	158,551		104,058
Acquired with deteriorated credit quality	2,885		1,648
Loans, net of unearned income	161,436		105,706
Real estate – 1-4 family mortgage
Investment in loans, net of unearned income on impairment methodology
Individually evaluated for impairment	25,374		28,848
Collectively evaluated for impairment	1,080,297		799,428
Acquired with deteriorated credit quality	102,562		75,147
Loans, net of unearned income	1,208,233		903,423
Real estate – commercial mortgage
Investment in loans, net of unearned income on impairment methodology
Individually evaluated for impairment	30,624		34,400
Collectively evaluated for impairment	1,618,758		1,234,374
Acquired with deteriorated credit quality	301,190		157,869
Loans, net of unearned income	1,950,572		1,426,643
Installment loans to individuals
Investment in loans, net of unearned income on impairment methodology
Individually evaluated for impairment	183		0
Collectively evaluated for impairment	84,822		55,206
Acquired with deteriorated credit quality	6,809		2,225
Loans, net of unearned income	$ 91,814	[1]	$ 57,431	[1]

[1] Includes lease financing receivables.