ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY (Credit Quality Indicators) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	$ 3,635,252	$ 3,470,927
Other Commercial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	114,705	98,265
Other Consumer Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	67,359	61,183
Commercial and Industrial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	1,362,045	1,268,458
Commercial and Industrial Loans [Member] | Working Capital Lines of Credit Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	703,993	624,362
Commercial and Industrial Loans [Member] | Non-working Capital Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	658,052	644,096
Commercial Real Estate and Multi-family Residential Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	1,408,262	1,299,282
Commercial Real Estate and Multi-family Residential Loans [Member] | Construction and Land Development Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	286,895	244,411
Commercial Real Estate and Multi-family Residential Loans [Member] | Owner Occupied Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	499,329	469,387
Commercial Real Estate and Multi-family Residential Loans [Member] | Nonowner Occupied Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	456,549	458,002
Commercial Real Estate and Multi-family Residential Loans [Member] | Multifamily Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	165,489	127,482
Agri-business and Agricultural Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	317,957	394,904
Agri-business and Agricultural Loans [Member] | Loans Secured By Farmland [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	161,559	172,632
Agri-business and Agricultural Loans [Member] | Loans For Agricultural Production [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	156,398	222,272
Consumer 1-4 Family Mortgage Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	364,924	348,835
Consumer 1-4 Family Mortgage Loans [Member] | Closed End First Mortgage Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	171,594	162,837
Consumer 1-4 Family Mortgage Loans [Member] | Open End And Junior Lien Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	182,826	171,015
Consumer 1-4 Family Mortgage Loans [Member] | Residential Construction and Land Development Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	10,504	14,983
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	3,106,218	2,980,993
Pass [Member] | Other Commercial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	114,700	98,261
Pass [Member] | Other Consumer Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	14,820	17,717
Pass [Member] | Commercial and Industrial Loans [Member] | Working Capital Lines of Credit Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	652,780	577,208
Pass [Member] | Commercial and Industrial Loans [Member] | Non-working Capital Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	612,991	583,135
Pass [Member] | Commercial Real Estate and Multi-family Residential Loans [Member] | Construction and Land Development Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	285,629	242,964
Pass [Member] | Commercial Real Estate and Multi-family Residential Loans [Member] | Owner Occupied Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	459,858	444,143
Pass [Member] | Commercial Real Estate and Multi-family Residential Loans [Member] | Nonowner Occupied Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	451,049	451,390
Pass [Member] | Commercial Real Estate and Multi-family Residential Loans [Member] | Multifamily Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	165,243	127,219
Pass [Member] | Agri-business and Agricultural Loans [Member] | Loans Secured By Farmland [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	149,474	168,660
Pass [Member] | Agri-business and Agricultural Loans [Member] | Loans For Agricultural Production [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	146,190	218,581
Pass [Member] | Consumer 1-4 Family Mortgage Loans [Member] | Closed End First Mortgage Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	45,220	44,687
Pass [Member] | Consumer 1-4 Family Mortgage Loans [Member] | Open End And Junior Lien Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	8,265	7,028
Pass [Member] | Consumer 1-4 Family Mortgage Loans [Member] | Residential Construction and Land Development Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	(1)	0
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	83,271	74,274
Special Mention [Member] | Other Commercial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	0	0
Special Mention [Member] | Other Consumer Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	0	0
Special Mention [Member] | Commercial and Industrial Loans [Member] | Working Capital Lines of Credit Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	30,041	17,636
Special Mention [Member] | Commercial and Industrial Loans [Member] | Non-working Capital Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	14,922	32,587
Special Mention [Member] | Commercial Real Estate and Multi-family Residential Loans [Member] | Construction and Land Development Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	1,266	1,447
Special Mention [Member] | Commercial Real Estate and Multi-family Residential Loans [Member] | Owner Occupied Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	15,124	10,285
Special Mention [Member] | Commercial Real Estate and Multi-family Residential Loans [Member] | Nonowner Occupied Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	4,697	4,550
Special Mention [Member] | Commercial Real Estate and Multi-family Residential Loans [Member] | Multifamily Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	246	263
Special Mention [Member] | Agri-business and Agricultural Loans [Member] | Loans Secured By Farmland [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	7,682	3,689
Special Mention [Member] | Agri-business and Agricultural Loans [Member] | Loans For Agricultural Production [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	9,293	3,691
Special Mention [Member] | Consumer 1-4 Family Mortgage Loans [Member] | Closed End First Mortgage Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	0	126
Special Mention [Member] | Consumer 1-4 Family Mortgage Loans [Member] | Open End And Junior Lien Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	0	0
Special Mention [Member] | Consumer 1-4 Family Mortgage Loans [Member] | Residential Construction and Land Development Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	0	0
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	79,120	72,392
Substandard [Member] | Other Commercial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	0	0
Substandard [Member] | Other Consumer Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	51	55
Substandard [Member] | Commercial and Industrial Loans [Member] | Working Capital Lines of Credit Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	20,997	29,396
Substandard [Member] | Commercial and Industrial Loans [Member] | Non-working Capital Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	26,041	24,405
Substandard [Member] | Commercial Real Estate and Multi-family Residential Loans [Member] | Construction and Land Development Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	0	0
Substandard [Member] | Commercial Real Estate and Multi-family Residential Loans [Member] | Owner Occupied Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	24,347	14,959
Substandard [Member] | Commercial Real Estate and Multi-family Residential Loans [Member] | Nonowner Occupied Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	803	2,062
Substandard [Member] | Commercial Real Estate and Multi-family Residential Loans [Member] | Multifamily Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	0	0
Substandard [Member] | Agri-business and Agricultural Loans [Member] | Loans Secured By Farmland [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	4,403	283
Substandard [Member] | Agri-business and Agricultural Loans [Member] | Loans For Agricultural Production [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	915	0
Substandard [Member] | Consumer 1-4 Family Mortgage Loans [Member] | Closed End First Mortgage Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	1,320	1,232
Substandard [Member] | Consumer 1-4 Family Mortgage Loans [Member] | Open End And Junior Lien Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	243	0
Substandard [Member] | Consumer 1-4 Family Mortgage Loans [Member] | Residential Construction and Land Development Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	0	0
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	0	0
Doubtful [Member] | Other Commercial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	0	0
Doubtful [Member] | Other Consumer Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	0	0
Doubtful [Member] | Commercial and Industrial Loans [Member] | Working Capital Lines of Credit Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	0	0
Doubtful [Member] | Commercial and Industrial Loans [Member] | Non-working Capital Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	0	0
Doubtful [Member] | Commercial Real Estate and Multi-family Residential Loans [Member] | Construction and Land Development Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	0	0
Doubtful [Member] | Commercial Real Estate and Multi-family Residential Loans [Member] | Owner Occupied Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	0	0
Doubtful [Member] | Commercial Real Estate and Multi-family Residential Loans [Member] | Nonowner Occupied Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	0	0
Doubtful [Member] | Commercial Real Estate and Multi-family Residential Loans [Member] | Multifamily Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	0	0
Doubtful [Member] | Agri-business and Agricultural Loans [Member] | Loans Secured By Farmland [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	0	0
Doubtful [Member] | Agri-business and Agricultural Loans [Member] | Loans For Agricultural Production [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	0	0
Doubtful [Member] | Consumer 1-4 Family Mortgage Loans [Member] | Closed End First Mortgage Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	0	0
Doubtful [Member] | Consumer 1-4 Family Mortgage Loans [Member] | Open End And Junior Lien Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	0	0
Doubtful [Member] | Consumer 1-4 Family Mortgage Loans [Member] | Residential Construction and Land Development Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	0	0
Not Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	366,643	343,268
Not Rated [Member] | Other Commercial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	5	4
Not Rated [Member] | Other Consumer Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	52,488	43,411
Not Rated [Member] | Commercial and Industrial Loans [Member] | Working Capital Lines of Credit Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	175	122
Not Rated [Member] | Commercial and Industrial Loans [Member] | Non-working Capital Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	4,098	3,969
Not Rated [Member] | Commercial Real Estate and Multi-family Residential Loans [Member] | Construction and Land Development Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	0	0
Not Rated [Member] | Commercial Real Estate and Multi-family Residential Loans [Member] | Owner Occupied Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	0	0
Not Rated [Member] | Commercial Real Estate and Multi-family Residential Loans [Member] | Nonowner Occupied Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	0	0
Not Rated [Member] | Commercial Real Estate and Multi-family Residential Loans [Member] | Multifamily Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	0	0
Not Rated [Member] | Agri-business and Agricultural Loans [Member] | Loans Secured By Farmland [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	0	0
Not Rated [Member] | Agri-business and Agricultural Loans [Member] | Loans For Agricultural Production [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	0	0
Not Rated [Member] | Consumer 1-4 Family Mortgage Loans [Member] | Closed End First Mortgage Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	125,054	116,792
Not Rated [Member] | Consumer 1-4 Family Mortgage Loans [Member] | Open End And Junior Lien Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	174,318	163,987
Not Rated [Member] | Consumer 1-4 Family Mortgage Loans [Member] | Residential Construction and Land Development Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total ending loans balance	$ 10,505	$ 14,983