Allowance for Loan Losses (Details 5) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	$ 19,618	$ 21,305
Financing Receivable, Recorded Investment, Current	1,893,711	1,891,717
Total	1,913,329	1,913,022
Commercial & Industrial
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	1,589	1,092
Financing Receivable, Recorded Investment, Current	490,558	474,709
Total	492,147	475,801
Farmland
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	4,119	4,012
Financing Receivable, Recorded Investment, Current	100,979	104,457
Total	105,098	108,469
Non Farm, Non Residential
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	2,592	141
Financing Receivable, Recorded Investment, Current	197,476	200,804
Total	200,068	200,945
Agriculture
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	679	702
Financing Receivable, Recorded Investment, Current	133,311	152,388
Total	133,990	153,090
All Other Commercial
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	67	0
Financing Receivable, Recorded Investment, Current	211,106	207,875
Total	211,173	207,875
First Liens
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	5,469	8,218
Financing Receivable, Recorded Investment, Current	242,629	247,029
Total	248,098	255,247
Home Equity
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	220	364
Financing Receivable, Recorded Investment, Current	35,751	35,752
Total	35,971	36,116
Junior Liens
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	208	574
Financing Receivable, Recorded Investment, Current	42,833	41,688
Total	43,041	42,262
Multifamily
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	0	0
Financing Receivable, Recorded Investment, Current	97,104	90,141
Total	97,104	90,141
All Other Residential
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	65	312
Financing Receivable, Recorded Investment, Current	13,069	13,329
Total	13,134	13,641
Motor Vehicle
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	4,479	5,761
Financing Receivable, Recorded Investment, Current	304,384	298,211
Total	308,863	303,972
All Other Consumer
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	131	129
Financing Receivable, Recorded Investment, Current	24,511	25,334
Total	24,642	25,463
Financing Receivables, 30 to 59 Days Past Due [Member]
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	8,862	12,223
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial & Industrial
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	538	372
Financing Receivables, 30 to 59 Days Past Due [Member] | Farmland
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	143	341
Financing Receivables, 30 to 59 Days Past Due [Member] | Non Farm, Non Residential
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	69	141
Financing Receivables, 30 to 59 Days Past Due [Member] | Agriculture
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	23	141
Financing Receivables, 30 to 59 Days Past Due [Member] | All Other Commercial
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	50	0
Financing Receivables, 30 to 59 Days Past Due [Member] | First Liens
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	4,160	5,467
Financing Receivables, 30 to 59 Days Past Due [Member] | Home Equity
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	191	310
Financing Receivables, 30 to 59 Days Past Due [Member] | Junior Liens
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	95	274
Financing Receivables, 30 to 59 Days Past Due [Member] | Multifamily
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	0	0
Financing Receivables, 30 to 59 Days Past Due [Member] | All Other Residential
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	53	300
Financing Receivables, 30 to 59 Days Past Due [Member] | Motor Vehicle
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	3,438	4,770
Financing Receivables, 30 to 59 Days Past Due [Member] | All Other Consumer
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	102	107
Financing Receivables, 60 to 89 Days Past Due [Member]
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	1,758	2,268
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial & Industrial
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	431	80
Financing Receivables, 60 to 89 Days Past Due [Member] | Farmland
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Non Farm, Non Residential
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	61	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Agriculture
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	25	0
Financing Receivables, 60 to 89 Days Past Due [Member] | All Other Commercial
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	17	0
Financing Receivables, 60 to 89 Days Past Due [Member] | First Liens
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	533	1,317
Financing Receivables, 60 to 89 Days Past Due [Member] | Home Equity
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	0	46
Financing Receivables, 60 to 89 Days Past Due [Member] | Junior Liens
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	56	106
Financing Receivables, 60 to 89 Days Past Due [Member] | Multifamily
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] | All Other Residential
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	0	0
Financing Receivables, 60 to 89 Days Past Due [Member] | Motor Vehicle
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	611	697
Financing Receivables, 60 to 89 Days Past Due [Member] | All Other Consumer
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	24	22
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	8,998	6,814
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial & Industrial
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	620	640
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Farmland
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	3,976	3,671
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Non Farm, Non Residential
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	2,462	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Agriculture
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	631	561
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | All Other Commercial
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | First Liens
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	776	1,434
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Home Equity
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	29	8
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Junior Liens
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	57	194
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Multifamily
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | All Other Residential
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	12	12
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Motor Vehicle
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	430	294
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | All Other Consumer
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	$ 5	$ 0