Purchased Loans - Impaired Loans (Details) - Purchased - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Recorded Investment
With a related allowance recorded:	$ 8,228
With no related allowance recorded:	5,644
Total Recorded Investment	13,872
Unpaid Principal Balance
With a related allowance recorded:	8,605
With no related allowance recorded:	6,457
Total Unpaid Principal Balance	15,062
Related Allowance	253
Average Recorded Investment
With a related allowance recorded:	8,113
With no related allowance recorded:	6,038
Average recorded investment in impaired loans	14,151	$ 9,396
Interest Income Recognized
With a related allowance recorded:	92
With no related allowance recorded:	80
Interest Income, Total	172	194
Receivables Acquired with Deteriorated Credit Quality
Recorded Investment
With a related allowance recorded:	66,897
With no related allowance recorded:	105,367
Total Recorded Investment	172,264
Unpaid Principal Balance
With a related allowance recorded:	73,399
With no related allowance recorded:	144,954
Total Unpaid Principal Balance	218,353
Related Allowance	1,971
Average Recorded Investment
With a related allowance recorded:	72,825
With no related allowance recorded:	121,658
Average recorded investment in impaired loans	194,483	212,967
Interest Income Recognized
With a related allowance recorded:	3,649
With no related allowance recorded:	6,729	$ 10,084
Interest Income, Total	10,378
Commercial, financial, agriculture
Recorded Investment
With a related allowance recorded:	1,837
With no related allowance recorded:	901
Unpaid Principal Balance
With a related allowance recorded:	2,074
With no related allowance recorded:	905
Related Allowance	212
Average Recorded Investment
With a related allowance recorded:	1,700
With no related allowance recorded:	912
Interest Income Recognized
With a related allowance recorded:	8
With no related allowance recorded:	0
Commercial, financial, agriculture | Receivables Acquired with Deteriorated Credit Quality
Recorded Investment
With a related allowance recorded:	3,695
With no related allowance recorded:	25,843
Unpaid Principal Balance
With a related allowance recorded:	7,370
With no related allowance recorded:	41,792
Related Allowance	292
Average Recorded Investment
With a related allowance recorded:	6,919
With no related allowance recorded:	37,535
Interest Income Recognized
With a related allowance recorded:	187
With no related allowance recorded:	1,208
Real estate - construction
Recorded Investment
With a related allowance recorded:	2,499
With no related allowance recorded:	772
Unpaid Principal Balance
With a related allowance recorded:	2,490
With no related allowance recorded:	779
Related Allowance	16
Average Recorded Investment
With a related allowance recorded:	2,386
With no related allowance recorded:	770
Interest Income Recognized
With a related allowance recorded:	3
With no related allowance recorded:	0
Real estate - construction | Receivables Acquired with Deteriorated Credit Quality
Recorded Investment
With a related allowance recorded:	0
With no related allowance recorded:	863
Unpaid Principal Balance
With a related allowance recorded:	0
With no related allowance recorded:	882
Related Allowance	0
Average Recorded Investment
With a related allowance recorded:	0
With no related allowance recorded:	618
Interest Income Recognized
With a related allowance recorded:	0
With no related allowance recorded:	21
Real estate - 1-4 family mortgage
Recorded Investment
With a related allowance recorded:	2,801
With no related allowance recorded:	3,772
Unpaid Principal Balance
With a related allowance recorded:	2,914
With no related allowance recorded:	4,550
Related Allowance	17
Average Recorded Investment
With a related allowance recorded:	2,900
With no related allowance recorded:	4,134
Interest Income Recognized
With a related allowance recorded:	41
With no related allowance recorded:	73
Real estate - 1-4 family mortgage | Receivables Acquired with Deteriorated Credit Quality
Recorded Investment
With a related allowance recorded:	10,061
With no related allowance recorded:	25,482
Unpaid Principal Balance
With a related allowance recorded:	10,372
With no related allowance recorded:	32,597
Related Allowance	291
Average Recorded Investment
With a related allowance recorded:	10,369
With no related allowance recorded:	26,687
Interest Income Recognized
With a related allowance recorded:	529
With no related allowance recorded:	1,665
Real estate - commercial mortgage
Recorded Investment
With a related allowance recorded:	981
With no related allowance recorded:	128
Unpaid Principal Balance
With a related allowance recorded:	1,017
With no related allowance recorded:	131
Related Allowance	6
Average Recorded Investment
With a related allowance recorded:	1,031
With no related allowance recorded:	137
Interest Income Recognized
With a related allowance recorded:	40
With no related allowance recorded:	7
Real estate - commercial mortgage | Receivables Acquired with Deteriorated Credit Quality
Recorded Investment
With a related allowance recorded:	52,501
With no related allowance recorded:	50,632
Unpaid Principal Balance
With a related allowance recorded:	55,017
With no related allowance recorded:	64,912
Related Allowance	1,386
Average Recorded Investment
With a related allowance recorded:	54,885
With no related allowance recorded:	53,586
Interest Income Recognized
With a related allowance recorded:	2,904
With no related allowance recorded:	3,500
Installment loans to individuals
Recorded Investment
With a related allowance recorded:	110
With no related allowance recorded:	71
Unpaid Principal Balance
With a related allowance recorded:	110
With no related allowance recorded:	92
Related Allowance	2
Average Recorded Investment
With a related allowance recorded:	96
With no related allowance recorded:	85
Interest Income Recognized
With a related allowance recorded:	0
With no related allowance recorded:	0
Installment loans to individuals | Receivables Acquired with Deteriorated Credit Quality
Recorded Investment
With a related allowance recorded:	640
With no related allowance recorded:	2,547
Unpaid Principal Balance
With a related allowance recorded:	640
With no related allowance recorded:	4,771
Related Allowance	2
Average Recorded Investment
With a related allowance recorded:	652
With no related allowance recorded:	3,232
Interest Income Recognized
With a related allowance recorded:	29
With no related allowance recorded:	$ 335