Loans and Asset Quality Information (Schedule of Carrying Amount of Covered Loans) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Covered loans:
Impaired Purchased Loans - Carrying Value	$ 1,950	$ 3,142
Impaired Purchased Loans - Unpaid Principal Balance	5,183	6,263
Nonimpaired Purchased Loans - Carrying Value	125,644	207,167
Nonimpaired Purchased Loans - Unpaid Principal Balance	145,698	261,497
Total Covered Loans - Carrying Value	127,594	210,309
Total Covered Loans - Unpaid Principal Balance	150,881	267,760
Commercial, financial and agricultural [Member]
Covered loans:
Impaired Purchased Loans - Carrying Value	66	75
Impaired Purchased Loans - Unpaid Principal Balance	123	136
Nonimpaired Purchased Loans - Carrying Value	1,617	4,199
Nonimpaired Purchased Loans - Unpaid Principal Balance	1,661	5,268
Total Covered Loans - Carrying Value	1,683	4,274
Total Covered Loans - Unpaid Principal Balance	1,784	5,404
Real Estate construction, land development and other land loans [Member]
Covered loans:
Impaired Purchased Loans - Carrying Value	309	325
Impaired Purchased Loans - Unpaid Principal Balance	534	564
Nonimpaired Purchased Loans - Carrying Value	5,235	31,509
Nonimpaired Purchased Loans - Unpaid Principal Balance	6,471	47,792
Total Covered Loans - Carrying Value	5,544	31,834
Total Covered Loans - Unpaid Principal Balance	7,005	48,356
Real estate mortgage residential (1-4 family) first mortgages [Member]
Covered loans:
Impaired Purchased Loans - Carrying Value	362	575
Impaired Purchased Loans - Unpaid Principal Balance	1,298	1,500
Nonimpaired Purchased Loans - Carrying Value	89,408	107,575
Nonimpaired Purchased Loans - Unpaid Principal Balance	104,678	126,882
Total Covered Loans - Carrying Value	89,770	108,150
Total Covered Loans - Unpaid Principal Balance	105,976	128,382
Real estate mortgage home equity loans/lines of credit [Member]
Covered loans:
Impaired Purchased Loans - Carrying Value	12	14
Impaired Purchased Loans - Unpaid Principal Balance	19	21
Nonimpaired Purchased Loans - Carrying Value	12,791	14,877
Nonimpaired Purchased Loans - Unpaid Principal Balance	15,099	18,318
Total Covered Loans - Carrying Value	12,803	14,891
Total Covered Loans - Unpaid Principal Balance	15,118	18,339
Real estate mortgage commercial and other [Member]
Covered loans:
Impaired Purchased Loans - Carrying Value	1,201	2,153
Impaired Purchased Loans - Unpaid Principal Balance	3,209	4,042
Nonimpaired Purchased Loans - Carrying Value	16,593	48,475
Nonimpaired Purchased Loans - Unpaid Principal Balance	17,789	62,630
Total Covered Loans - Carrying Value	17,794	50,628
Total Covered Loans - Unpaid Principal Balance	20,998	66,672
Installment loans to individual [Member]
Covered loans:
Impaired Purchased Loans - Carrying Value
Impaired Purchased Loans - Unpaid Principal Balance
Nonimpaired Purchased Loans - Carrying Value		532
Nonimpaired Purchased Loans - Unpaid Principal Balance		607
Total Covered Loans - Carrying Value		532
Total Covered Loans - Unpaid Principal Balance		$ 607

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The unpaid principal balance of covered impaired purchased loans.

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The carrying value of covered non-impaired purchased loans.

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The unpaid principal balance of covered non-impaired purchased loans.

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Aggregate amount of the unpaid principal balances of covered loans.

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Aggregate gross carrying amount of loans and leases receivable covered by loss sharing agreements.

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