Purchased Loans (Details 2) - Purchased - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Impaired loans
Recorded Investment With Allowance	$ 4,538	$ 4,583
Recorded Investment With No Allowance	1,847	0
Total Recorded Investment	6,385	4,583
Unpaid Principal Balance With Allowance	4,646	4,676
Unpaid Principal Balance With no Allowance	2,028	0
Total Unpaid Principal Balance	6,674	4,676
With Related Allowance	515	214
With No Related Allowance	0	0
Related Allowance	515	214
Average Recorded Investment With Related Allowance	4,617	2,860
Average Recorded Investment With No Related Allowance	1,977	0
Average recorded investment in impaired loans	6,594	2,860	$ 2,037
Interest Income Recognized With Related Allowance	120	125
Interest Income Recognized With No Related Allowance	48	0
Interest Income, Total	168	125
Commercial, financial, agricultural
Impaired loans
Recorded Investment With Allowance	487	14
Recorded Investment With No Allowance	224	0
Unpaid Principal Balance With Allowance	503	17
Unpaid Principal Balance With no Allowance	229	0
With Related Allowance	310	0
With No Related Allowance	0	0
Average Recorded Investment With Related Allowance	500	18
Average Recorded Investment With No Related Allowance	172	0
Interest Income Recognized With Related Allowance	2	0
Interest Income Recognized With No Related Allowance	4	0
Lease financing
Impaired loans
Recorded Investment With Allowance	0	0
Recorded Investment With No Allowance	0	0
Unpaid Principal Balance With Allowance	0	0
Unpaid Principal Balance With no Allowance	0	0
With Related Allowance	0	0
With No Related Allowance	0	0
Average Recorded Investment With Related Allowance	0	0
Average Recorded Investment With No Related Allowance	0	0
Interest Income Recognized With Related Allowance	0	0
Interest Income Recognized With No Related Allowance	0	0
Real estate – construction
Impaired loans
Recorded Investment With Allowance	145	2,698
Recorded Investment With No Allowance	0	0
Unpaid Principal Balance With Allowance	147	2,710
Unpaid Principal Balance With no Allowance	0	0
With Related Allowance	0	20
With No Related Allowance	0	0
Average Recorded Investment With Related Allowance	148	899
Average Recorded Investment With No Related Allowance	0	0
Interest Income Recognized With Related Allowance	0	78
Interest Income Recognized With No Related Allowance	0	0
Real estate – 1-4 family mortgage
Impaired loans
Recorded Investment With Allowance	1,496	655
Recorded Investment With No Allowance	1,385	0
Unpaid Principal Balance With Allowance	1,538	675
Unpaid Principal Balance With no Allowance	1,557	0
With Related Allowance	43	1
With No Related Allowance	0	0
Average Recorded Investment With Related Allowance	1,535	712
Average Recorded Investment With No Related Allowance	1,550	0
Interest Income Recognized With Related Allowance	7	28
Interest Income Recognized With No Related Allowance	33	0
Real estate – commercial mortgage
Impaired loans
Recorded Investment With Allowance	2,275	1,193
Recorded Investment With No Allowance	183	0
Unpaid Principal Balance With Allowance	2,299	1,251
Unpaid Principal Balance With no Allowance	186	0
With Related Allowance	48	193
With No Related Allowance	0	0
Average Recorded Investment With Related Allowance	2,273	1,223
Average Recorded Investment With No Related Allowance	194	0
Interest Income Recognized With Related Allowance	111	19
Interest Income Recognized With No Related Allowance	11	0
Installment loans to individuals
Impaired loans
Recorded Investment With Allowance	135	23
Recorded Investment With No Allowance	55	0
Unpaid Principal Balance With Allowance	159	23
Unpaid Principal Balance With no Allowance	56	0
With Related Allowance	114	0
With No Related Allowance	0	0
Average Recorded Investment With Related Allowance	161	8
Average Recorded Investment With No Related Allowance	61	0
Interest Income Recognized With Related Allowance	0	0
Interest Income Recognized With No Related Allowance	0	0
Receivables Acquired with Deteriorated Credit Quality
Impaired loans
Recorded Investment With Allowance	89,257	75,061
Recorded Investment With No Allowance	182,501	261,104
Total Recorded Investment	271,758	336,165
Unpaid Principal Balance With Allowance	99,504	80,340
Unpaid Principal Balance With no Allowance	240,600	350,171
Total Unpaid Principal Balance	340,104	430,511
With Related Allowance	2,820	1,706
With No Related Allowance	0	0
Related Allowance	2,820	1,706
Average Recorded Investment With Related Allowance	90,890	77,236
Average Recorded Investment With No Related Allowance	227,142	277,774
Average recorded investment in impaired loans	318,032	355,010
Interest Income Recognized With Related Allowance	3,909	3,691
Interest Income Recognized With No Related Allowance	10,623	14,137
Interest Income, Total	14,532	17,828
Receivables Acquired with Deteriorated Credit Quality | Commercial, financial, agricultural
Impaired loans
Recorded Investment With Allowance	4,555	5,197
Recorded Investment With No Allowance	7,439	11,292
Unpaid Principal Balance With Allowance	5,038	5,694
Unpaid Principal Balance With no Allowance	15,659	21,355
With Related Allowance	372	353
With No Related Allowance	0	0
Average Recorded Investment With Related Allowance	4,728	4,774
Average Recorded Investment With No Related Allowance	10,304	10,830
Interest Income Recognized With Related Allowance	207	212
Interest Income Recognized With No Related Allowance	819	1,106
Receivables Acquired with Deteriorated Credit Quality | Lease financing
Impaired loans
Recorded Investment With Allowance	0	0
Recorded Investment With No Allowance	0	0
Unpaid Principal Balance With Allowance	0	0
Unpaid Principal Balance With no Allowance	0	0
With Related Allowance	0	0
With No Related Allowance	0	0
Average Recorded Investment With Related Allowance	0	0
Average Recorded Investment With No Related Allowance	0	0
Interest Income Recognized With Related Allowance	0	0
Interest Income Recognized With No Related Allowance	0	0
Receivables Acquired with Deteriorated Credit Quality | Real estate – construction
Impaired loans
Recorded Investment With Allowance	0	0
Recorded Investment With No Allowance	840	2,749
Unpaid Principal Balance With Allowance	0	0
Unpaid Principal Balance With no Allowance	1,141	2,916
With Related Allowance	0	0
With No Related Allowance	0	0
Average Recorded Investment With Related Allowance	0	0
Average Recorded Investment With No Related Allowance	648	1,114
Interest Income Recognized With Related Allowance	0	0
Interest Income Recognized With No Related Allowance	38	108
Receivables Acquired with Deteriorated Credit Quality | Real estate – 1-4 family mortgage
Impaired loans
Recorded Investment With Allowance	21,887	15,702
Recorded Investment With No Allowance	50,065	75,947
Unpaid Principal Balance With Allowance	23,128	16,002
Unpaid Principal Balance With no Allowance	63,597	93,291
With Related Allowance	841	256
With No Related Allowance	0	0
Average Recorded Investment With Related Allowance	23,021	15,498
Average Recorded Investment With No Related Allowance	64,306	82,562
Interest Income Recognized With Related Allowance	1,015	799
Interest Income Recognized With No Related Allowance	2,636	3,258
Receivables Acquired with Deteriorated Credit Quality | Real estate – commercial mortgage
Impaired loans
Recorded Investment With Allowance	62,449	53,762
Recorded Investment With No Allowance	122,538	168,848
Unpaid Principal Balance With Allowance	70,970	57,950
Unpaid Principal Balance With no Allowance	158,105	229,871
With Related Allowance	1,606	1,096
With No Related Allowance	0	0
Average Recorded Investment With Related Allowance	62,759	56,548
Average Recorded Investment With No Related Allowance	149,917	180,326
Interest Income Recognized With Related Allowance	2,674	2,667
Interest Income Recognized With No Related Allowance	7,053	9,546
Receivables Acquired with Deteriorated Credit Quality | Installment loans to individuals
Impaired loans
Recorded Investment With Allowance	366	400
Recorded Investment With No Allowance	1,619	2,268
Unpaid Principal Balance With Allowance	368	694
Unpaid Principal Balance With no Allowance	2,098	2,738
With Related Allowance	1	1
With No Related Allowance	0	0
Average Recorded Investment With Related Allowance	382	416
Average Recorded Investment With No Related Allowance	1,967	2,942
Interest Income Recognized With Related Allowance	13	13
Interest Income Recognized With No Related Allowance	$ 77	$ 119