Loans - Receivables Past Due (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	$ 53,259	$ 41,513
Current	1,740,875	1,487,453
Total Loans before Unearned Income	1,794,134	1,528,966
Recorded Investment 90 Days Accruing	5,728	2,639
Unearned income	(5,418)	(3,476)
Total loans net of unearned income	1,788,716	1,525,490
Nonaccrual loans	25,290	14,403
30-89 Days Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	22,241	24,471
90 Days or Greater
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	31,018	17,042
Real Estate
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	43,609	32,200
Current	1,214,748	1,092,932
Total Loans before Unearned Income	1,258,357	1,125,132
Recorded Investment 90 Days Accruing	4,839	2,574
Nonaccrual loans	20,251	9,060
Real Estate | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	18,519	20,566
Real Estate | 90 Days or Greater
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	25,090	11,634
Real Estate | Construction & land development
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	2,086	1,189
Current	151,883	171,058
Total Loans before Unearned Income	153,969	172,247
Recorded Investment 90 Days Accruing	520	48
Nonaccrual loans	663	381
Real Estate | Construction & land development | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	903	760
Real Estate | Construction & land development | 90 Days or Greater
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	1,183	429
Real Estate | Farmland
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	5,464	1,280
Current	22,268	21,461
Total Loans before Unearned Income	27,732	22,741
Recorded Investment 90 Days Accruing	429	0
Nonaccrual loans	857	1,274
Real Estate | Farmland | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	4,178	6
Real Estate | Farmland | 90 Days or Greater
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	1,286	1,274
Real Estate | 1- 4 family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	15,380	12,203
Current	258,307	277,432
Total Loans before Unearned Income	273,687	289,635
Recorded Investment 90 Days Accruing	2,677	923
Nonaccrual loans	5,160	2,759
Real Estate | 1- 4 family | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	7,543	8,521
Real Estate | 1- 4 family | 90 Days or Greater
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	7,837	3,682
Real Estate | Multifamily
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	1,171	0
Current	40,124	23,973
Total Loans before Unearned Income	41,295	23,973
Recorded Investment 90 Days Accruing	370	0
Nonaccrual loans	0	0
Real Estate | Multifamily | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	801	0
Real Estate | Multifamily | 90 Days or Greater
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	370	0
Real Estate | Non-farm non-residential
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	19,508	17,528
Current	742,166	599,008
Total Loans before Unearned Income	761,674	616,536
Recorded Investment 90 Days Accruing	843	1,603
Nonaccrual loans	13,571	4,646
Real Estate | Non-farm non-residential | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	5,094	11,279
Real Estate | Non-farm non-residential | 90 Days or Greater
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	14,414	6,249
Non-Real Estate
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	9,650	9,313
Current	526,127	394,521
Total Loans before Unearned Income	535,777	403,834
Recorded Investment 90 Days Accruing	889	65
Nonaccrual loans	5,039	5,343
Non-Real Estate | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	3,722	3,905
Non-Real Estate | 90 Days or Greater
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	5,928	5,408
Non-Real Estate | Agricultural
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	4,187	5,110
Current	31,438	21,600
Total Loans before Unearned Income	35,625	26,710
Recorded Investment 90 Days Accruing	144	0
Nonaccrual loans	3,934	4,800
Non-Real Estate | Agricultural | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	109	310
Non-Real Estate | Agricultural | 90 Days or Greater
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	4,078	4,800
Non-Real Estate | Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	4,104	3,143
Current	374,822	265,113
Total Loans before Unearned Income	378,926	268,256
Recorded Investment 90 Days Accruing	599	15
Nonaccrual loans	792	327
Non-Real Estate | Commercial and industrial | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	2,713	2,801
Non-Real Estate | Commercial and industrial | 90 Days or Greater
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	1,391	342
Non-Real Estate | Consumer and other
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	1,359	1,060
Current	119,867	107,808
Total Loans before Unearned Income	121,226	108,868
Recorded Investment 90 Days Accruing	146	50
Nonaccrual loans	313	216
Non-Real Estate | Consumer and other | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	900	794
Non-Real Estate | Consumer and other | 90 Days or Greater
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	$ 459	$ 266