Loans and Allowance for Loan Losses (Impaired Loans Disclosure) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, recorded investment	$ 29,890	$ 39,865
With an allowance recorded, recorded investment	9,693	2,965
Impaired Financing Receivable, Recorded Investment	39,583	42,830
With no related allowance recorded, unpaid principal balance	38,816	52,872
With an allowance recorded, unpaid principal balance	10,455	3,032
Impaired Financing Receivable, Unpaid Principal Balance	49,271	55,904
Related allowance	855	927
Purchased impaired loans with subsequent deterioration	141,924	161,307
Purchased impaired loans with subsequent credit deterioration, unpaid principal balance	150,421	172,301
Purchased impaired loans with subsequent deterioration, related allowance	4,123	5,560
Commercial and agricultural [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, recorded investment	242	398
With an allowance recorded, recorded investment	0	0
Impaired Financing Receivable, Recorded Investment	242	398
With no related allowance recorded, unpaid principal balance	485	643
With an allowance recorded, unpaid principal balance	0	0
Impaired Financing Receivable, Unpaid Principal Balance	485	643
Related allowance	0	0
Purchased impaired loans with subsequent deterioration	9,024	10,729
Purchased impaired loans with subsequent credit deterioration, unpaid principal balance	7,823	10,344
Purchased impaired loans with subsequent deterioration, related allowance	581	382
Real estate - construction [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, recorded investment	2,179	4,734
With an allowance recorded, recorded investment	547	0
Impaired Financing Receivable, Recorded Investment	2,726	4,734
With no related allowance recorded, unpaid principal balance	2,736	8,893
With an allowance recorded, unpaid principal balance	643	0
Impaired Financing Receivable, Unpaid Principal Balance	3,379	8,893
Related allowance	280	0
Purchased impaired loans with subsequent deterioration	10,437	9,792
Purchased impaired loans with subsequent credit deterioration, unpaid principal balance	11,521	11,216
Purchased impaired loans with subsequent deterioration, related allowance	729	1,015
Real estate - mortgage, 1-4 family residential [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, recorded investment	8,220	11,154
With an allowance recorded, recorded investment	3,698	2,965
Impaired Financing Receivable, Recorded Investment	11,918	14,119
With no related allowance recorded, unpaid principal balance	10,940	14,431
With an allowance recorded, unpaid principal balance	4,020	3,032
Impaired Financing Receivable, Unpaid Principal Balance	14,960	17,463
Related allowance	452	927
Purchased impaired loans with subsequent deterioration	19,528	26,628
Purchased impaired loans with subsequent credit deterioration, unpaid principal balance	21,076	28,143
Purchased impaired loans with subsequent deterioration, related allowance	411	724
Real estate - mortgage, commercial [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, recorded investment	19,249	23,579
With an allowance recorded, recorded investment	5,448	0
Impaired Financing Receivable, Recorded Investment	24,697	23,579
With no related allowance recorded, unpaid principal balance	24,655	28,905
With an allowance recorded, unpaid principal balance	5,792	0
Impaired Financing Receivable, Unpaid Principal Balance	30,447	28,905
Related allowance	123	0
Purchased impaired loans with subsequent deterioration	101,847	113,178
Purchased impaired loans with subsequent credit deterioration, unpaid principal balance	109,289	121,813
Purchased impaired loans with subsequent deterioration, related allowance	2,212	3,251
Consumer [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, recorded investment	0	0
With an allowance recorded, recorded investment	0	0
Impaired Financing Receivable, Recorded Investment	0	0
With no related allowance recorded, unpaid principal balance	0	0
With an allowance recorded, unpaid principal balance	0	0
Impaired Financing Receivable, Unpaid Principal Balance	0	0
Related allowance	0	0
Purchased impaired loans with subsequent deterioration	1,088	980
Purchased impaired loans with subsequent credit deterioration, unpaid principal balance	712	785
Purchased impaired loans with subsequent deterioration, related allowance	$ 190	$ 188