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ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY (Aging Of The Recorded Investment In Past Due Loans) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	$ 3,981,164	$ 3,897,455
30 to 89 Days Past Due	2,457	10,025
Nonaccrual	14,997	7,265
Total Past Due and Nonaccural	17,454	17,290
Total	3,998,618	3,914,745
Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Other Commercial Loans
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	103,949	95,520
30 to 89 Days Past Due	0	0
Nonaccrual	0	0
Total Past Due and Nonaccural	0	0
Total	103,949	95,520
Other Commercial Loans | Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Other consumer loans
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	86,624	85,654
30 to 89 Days Past Due	125	168
Nonaccrual	0	0
Total Past Due and Nonaccural	125	168
Total	86,749	85,822
Other consumer loans | Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Commercial and Industrial Loans
Financing Receivable, Recorded Investment, Aging [Abstract]
Total	1,450,361	1,405,338
Commercial and Industrial Loans | Working Capital Lines of Credit Loans
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	748,862	684,191
30 to 89 Days Past Due	20	4,328
Nonaccrual	6,364	2,245
Total Past Due and Nonaccural	6,384	6,573
Total	755,246	690,764
Commercial and Industrial Loans | Working Capital Lines of Credit Loans | Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Commercial and Industrial Loans | Non-working Capital Loans
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	689,781	709,629
30 to 89 Days Past Due	5	3,368
Nonaccrual	5,329	1,577
Total Past Due and Nonaccural	5,334	4,945
Total	695,115	714,574
Commercial and Industrial Loans | Non-working Capital Loans | Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Commercial Real Estate and Multi-family Residential Loans
Financing Receivable, Recorded Investment, Aging [Abstract]
Total	1,653,047	1,567,165
Commercial Real Estate and Multi-family Residential Loans | Construction and Land Development Loans
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	320,380	265,544
30 to 89 Days Past Due	24	0
Nonaccrual	0	0
Total Past Due and Nonaccural	24	0
Total	320,404	265,544
Commercial Real Estate and Multi-family Residential Loans | Construction and Land Development Loans | Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Commercial Real Estate and Multi-family Residential Loans | Owner Occupied Loans
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	554,607	583,214
30 to 89 Days Past Due	0	486
Nonaccrual	2,185	2,269
Total Past Due and Nonaccural	2,185	2,755
Total	556,792	585,969
Commercial Real Estate and Multi-family Residential Loans | Owner Occupied Loans | Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Commercial Real Estate and Multi-family Residential Loans | Nonowner Occupied Loans
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	533,215	520,431
30 to 89 Days Past Due	103	57
Nonaccrual	0	0
Total Past Due and Nonaccural	103	57
Total	533,318	520,488
Commercial Real Estate and Multi-family Residential Loans | Nonowner Occupied Loans | Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Commercial Real Estate and Multi-family Residential Loans | Multifamily Loans
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	242,533	195,164
30 to 89 Days Past Due	0	0
Nonaccrual	0	0
Total Past Due and Nonaccural	0	0
Total	242,533	195,164
Commercial Real Estate and Multi-family Residential Loans | Multifamily Loans | Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Commercial Real Estate and Multi-family Residential Loans | Other Commercial Loans
Financing Receivable, Recorded Investment, Aging [Abstract]
Total		585,969
Agri-business and Agricultural Loans
Financing Receivable, Recorded Investment, Aging [Abstract]
Total	314,583	370,607
Agri-business and Agricultural Loans | Loans Secured By Farmland
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	148,469	177,080
30 to 89 Days Past Due	0	150
Nonaccrual	430	283
Total Past Due and Nonaccural	430	433
Total	148,899	177,513
Agri-business and Agricultural Loans | Loans Secured By Farmland | Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Agri-business and Agricultural Loans | Loans For Agricultural Production
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	165,684	193,094
30 to 89 Days Past Due	0	0
Nonaccrual	0	0
Total Past Due and Nonaccural	0	0
Total	165,684	193,094
Agri-business and Agricultural Loans | Loans For Agricultural Production | Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Agri-business and Agricultural Loans | Other Commercial Loans
Financing Receivable, Recorded Investment, Aging [Abstract]
Total	103,949	95,520
Consumer 1-4 Family Mortgage Loans
Financing Receivable, Recorded Investment, Aging [Abstract]
Total	389,929	390,293
Consumer 1-4 Family Mortgage Loans | Other Commercial Loans
Financing Receivable, Recorded Investment, Aging [Abstract]
Total	86,749	85,822
Consumer 1-4 Family Mortgage Loans | Closed End First Mortgage Loans
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	185,676	183,420
30 to 89 Days Past Due	1,235	1,370
Nonaccrual	597	671
Total Past Due and Nonaccural	1,832	2,041
Total	187,508	185,461
Consumer 1-4 Family Mortgage Loans | Closed End First Mortgage Loans | Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Consumer 1-4 Family Mortgage Loans | Home Equity Mortgage Open Ended Revolving Lines
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	189,150	188,320
30 to 89 Days Past Due	945	98
Nonaccrual	92	220
Total Past Due and Nonaccural	1,037	318
Total	190,187	188,638
Consumer 1-4 Family Mortgage Loans | Home Equity Mortgage Open Ended Revolving Lines | Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Consumer 1-4 Family Mortgage Loans | Residential Construction and Land Development Loans
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	12,234	16,194
30 to 89 Days Past Due	0	0
Nonaccrual	0	0
Total Past Due and Nonaccural	0	0
Total	12,234	16,194
Consumer 1-4 Family Mortgage Loans | Residential Construction and Land Development Loans | Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	$ 0	$ 0

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