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ALLOWANCE FOR LOAN LOSSES: (Details 5) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	$ 16,682	$ 21,305
Current	1,944,526	1,891,717
BALANCE AT END OF YEAR	1,961,208	1,913,022
Commercial & Industrial
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	1,782	1,092
Current	518,239	474,709
BALANCE AT END OF YEAR	520,021	475,801
Farmland
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	2,659	4,012
Current	104,981	104,457
BALANCE AT END OF YEAR	107,640	108,469
Non Farm, Non Residential
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	57	141
Current	188,706	200,804
BALANCE AT END OF YEAR	188,763	200,945
Agriculture
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	388	702
Current	148,345	152,388
BALANCE AT END OF YEAR	148,733	153,090
All Other Commercial
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	33	0
Current	208,633	207,875
BALANCE AT END OF YEAR	208,666	207,875
First Liens
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	5,267	8,218
Current	231,684	247,029
BALANCE AT END OF YEAR	236,951	255,247
Home Equity
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	273	364
Current	39,378	35,752
BALANCE AT END OF YEAR	39,651	36,116
Junior Liens
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	420	574
Current	49,111	41,688
BALANCE AT END OF YEAR	49,531	42,262
Multifamily
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	0	0
Current	109,609	90,141
BALANCE AT END OF YEAR	109,609	90,141
All Other Residential
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	24	312
Current	9,146	13,329
BALANCE AT END OF YEAR	9,170	13,641
Motor Vehicle
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	5,552	5,761
Current	309,238	298,211
BALANCE AT END OF YEAR	314,790	303,972
All Other Consumer
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	227	129
Current	27,456	25,334
BALANCE AT END OF YEAR	27,683	25,463
30 to 59 Days Past Due
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	10,229	12,223
30 to 59 Days Past Due | Commercial & Industrial
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	1,017	372
30 to 59 Days Past Due | Farmland
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	515	341
30 to 59 Days Past Due | Non Farm, Non Residential
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	0	141
30 to 59 Days Past Due | Agriculture
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	41	141
30 to 59 Days Past Due | All Other Commercial
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	30	0
30 to 59 Days Past Due | First Liens
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	3,365	5,467
30 to 59 Days Past Due | Home Equity
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	155	310
30 to 59 Days Past Due | Junior Liens
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	132	274
30 to 59 Days Past Due | Multifamily
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	0	0
30 to 59 Days Past Due | All Other Residential
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	0	300
30 to 59 Days Past Due | Motor Vehicle
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	4,766	4,770
30 to 59 Days Past Due | All Other Consumer
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	208	107
60 to 89 Days Past Due
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	1,718	2,268
60 to 89 Days Past Due | Commercial & Industrial
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	420	80
60 to 89 Days Past Due | Farmland
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	8	0
60 to 89 Days Past Due | Non Farm, Non Residential
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	0	0
60 to 89 Days Past Due | Agriculture
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	0	0
60 to 89 Days Past Due | All Other Commercial
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	3	0
60 to 89 Days Past Due | First Liens
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	429	1,317
60 to 89 Days Past Due | Home Equity
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	8	46
60 to 89 Days Past Due | Junior Liens
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	225	106
60 to 89 Days Past Due | Multifamily
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	0	0
60 to 89 Days Past Due | All Other Residential
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	9	0
60 to 89 Days Past Due | Motor Vehicle
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	609	697
60 to 89 Days Past Due | All Other Consumer
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	7	22
Greater than 90 Days Past Due
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	4,735	6,814
Greater than 90 Days Past Due | Commercial & Industrial
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	345	640
Greater than 90 Days Past Due | Farmland
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	2,136	3,671
Greater than 90 Days Past Due | Non Farm, Non Residential
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	57	0
Greater than 90 Days Past Due | Agriculture
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	347	561
Greater than 90 Days Past Due | All Other Commercial
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	0	0
Greater than 90 Days Past Due | First Liens
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	1,473	1,434
Greater than 90 Days Past Due | Home Equity
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	110	8
Greater than 90 Days Past Due | Junior Liens
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	63	194
Greater than 90 Days Past Due | Multifamily
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	0	0
Greater than 90 Days Past Due | All Other Residential
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	15	12
Greater than 90 Days Past Due | Motor Vehicle
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	177	294
Greater than 90 Days Past Due | All Other Consumer
Aging of recorded investment in loans by past due category and class of loans
Total Past Due	$ 12	$ 0

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