ALLOWANCE FOR CREDIT LOSSES AND CREDIT QUALITY - Aging Of The Recorded Investment In Past Due Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	$ 4,287,841
Total Nonaccrual	14,973	$ 13,369
Nonaccrual With No Allowance For Credit Loss	7,711	4,649,156
Loans Not Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	4,286,997	4,635,787
30-89 Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	727	1,267
Greater than 89 Days Past Due and Accruing
Financing Receivable, Allowance for Credit Loss [Line Items]
Greater than 89 Days Past Due and Accruing	117	116
Total Accruing
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	4,272,868	11,986
Commercial and Industrial | Working capital lines of credit loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	652,927
Total Nonaccrual	5,966	606
Nonaccrual With No Allowance For Credit Loss	5,200	626,099
Commercial and Industrial | Working capital lines of credit loans | Loans Not Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	652,903	625,493
Commercial and Industrial | Working capital lines of credit loans | 30-89 Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	24	0
Commercial and Industrial | Working capital lines of credit loans | Greater than 89 Days Past Due and Accruing
Financing Receivable, Allowance for Credit Loss [Line Items]
Greater than 89 Days Past Due and Accruing	0	0
Commercial and Industrial | Working capital lines of credit loans | Total Accruing
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	646,961	606
Commercial and Industrial | Non-working capital loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	735,659
Total Nonaccrual	4,596	5,287
Nonaccrual With No Allowance For Credit Loss	229	1,158,827
Commercial and Industrial | Non-working capital loans | Loans Not Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	735,658	1,153,540
Commercial and Industrial | Non-working capital loans | 30-89 Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	1	0
Commercial and Industrial | Non-working capital loans | Greater than 89 Days Past Due and Accruing
Financing Receivable, Allowance for Credit Loss [Line Items]
Greater than 89 Days Past Due and Accruing	0	0
Commercial and Industrial | Non-working capital loans | Total Accruing
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	731,063	5,287
Commercial Real Estate and Multi-family Residential | Construction and land development loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	378,030
Total Nonaccrual	0	0
Nonaccrual With No Allowance For Credit Loss	0	361,664
Commercial Real Estate and Multi-family Residential | Construction and land development loans | Loans Not Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	378,030	361,664
Commercial Real Estate and Multi-family Residential | Construction and land development loans | 30-89 Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	0	0
Commercial Real Estate and Multi-family Residential | Construction and land development loans | Greater than 89 Days Past Due and Accruing
Financing Receivable, Allowance for Credit Loss [Line Items]
Greater than 89 Days Past Due and Accruing	0	0
Commercial Real Estate and Multi-family Residential | Construction and land development loans | Total Accruing
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	378,030	0
Commercial Real Estate and Multi-family Residential | Owner occupied loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	738,791
Total Nonaccrual	3,634	5,047
Nonaccrual With No Allowance For Credit Loss	2,129	647,574
Commercial Real Estate and Multi-family Residential | Owner occupied loans | Loans Not Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	738,791	642,527
Commercial Real Estate and Multi-family Residential | Owner occupied loans | 30-89 Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	0	0
Commercial Real Estate and Multi-family Residential | Owner occupied loans | Greater than 89 Days Past Due and Accruing
Financing Receivable, Allowance for Credit Loss [Line Items]
Greater than 89 Days Past Due and Accruing	0	0
Commercial Real Estate and Multi-family Residential | Owner occupied loans | Total Accruing
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	735,157	5,047
Commercial Real Estate and Multi-family Residential | Nonowner occupied loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	588,039
Total Nonaccrual	0	0
Nonaccrual With No Allowance For Credit Loss	0	579,050
Commercial Real Estate and Multi-family Residential | Nonowner occupied loans | Loans Not Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	588,039	579,050
Commercial Real Estate and Multi-family Residential | Nonowner occupied loans | 30-89 Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	0	0
Commercial Real Estate and Multi-family Residential | Nonowner occupied loans | Greater than 89 Days Past Due and Accruing
Financing Receivable, Allowance for Credit Loss [Line Items]
Greater than 89 Days Past Due and Accruing	0	0
Commercial Real Estate and Multi-family Residential | Nonowner occupied loans | Total Accruing
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	588,039	0
Commercial Real Estate and Multi-family Residential | Multi-family loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	246,787
Total Nonaccrual	0	0
Nonaccrual With No Allowance For Credit Loss	0	304,284
Commercial Real Estate and Multi-family Residential | Multi-family loans | Loans Not Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	246,787	304,284
Commercial Real Estate and Multi-family Residential | Multi-family loans | 30-89 Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	0	0
Commercial Real Estate and Multi-family Residential | Multi-family loans | Greater than 89 Days Past Due and Accruing
Financing Receivable, Allowance for Credit Loss [Line Items]
Greater than 89 Days Past Due and Accruing	0	0
Commercial Real Estate and Multi-family Residential | Multi-family loans | Total Accruing
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	246,787	0
Agri-business and Agricultural | Loans secured by farmland
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	206,302
Total Nonaccrual	335	428
Nonaccrual With No Allowance For Credit Loss	0	195,363
Agri-business and Agricultural | Loans secured by farmland | Loans Not Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	206,302	194,935
Agri-business and Agricultural | Loans secured by farmland | 30-89 Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	0	0
Agri-business and Agricultural | Loans secured by farmland | Greater than 89 Days Past Due and Accruing
Financing Receivable, Allowance for Credit Loss [Line Items]
Greater than 89 Days Past Due and Accruing	0	0
Agri-business and Agricultural | Loans secured by farmland | Total Accruing
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	205,967	428
Agri-business and Agricultural | Loans for agricultural production
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	239,573
Total Nonaccrual	0	108
Nonaccrual With No Allowance For Credit Loss	0	234,299
Agri-business and Agricultural | Loans for agricultural production | Loans Not Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	239,573	234,191
Agri-business and Agricultural | Loans for agricultural production | 30-89 Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	0	108
Agri-business and Agricultural | Loans for agricultural production | Greater than 89 Days Past Due and Accruing
Financing Receivable, Allowance for Credit Loss [Line Items]
Greater than 89 Days Past Due and Accruing	0	0
Agri-business and Agricultural | Loans for agricultural production | Total Accruing
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	239,573	0
Agri-business and Agricultural | Other commercial loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	73,178
Total Nonaccrual	0	0
Nonaccrual With No Allowance For Credit Loss	0	93,912
Agri-business and Agricultural | Other commercial loans | Loans Not Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	73,178	93,912
Agri-business and Agricultural | Other commercial loans | 30-89 Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	0	0
Agri-business and Agricultural | Other commercial loans | Greater than 89 Days Past Due and Accruing
Financing Receivable, Allowance for Credit Loss [Line Items]
Greater than 89 Days Past Due and Accruing	0	0
Agri-business and Agricultural | Other commercial loans | Total Accruing
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	73,178	0
Consumer 1-4 Family Mortgage | Closed end first mortgage loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	176,295
Total Nonaccrual	55	1,606
Nonaccrual With No Allowance For Credit Loss	55	167,501
Consumer 1-4 Family Mortgage | Closed end first mortgage loans | Loans Not Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	175,678	165,895
Consumer 1-4 Family Mortgage | Closed end first mortgage loans | 30-89 Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	500	877
Consumer 1-4 Family Mortgage | Closed end first mortgage loans | Greater than 89 Days Past Due and Accruing
Financing Receivable, Allowance for Credit Loss [Line Items]
Greater than 89 Days Past Due and Accruing	117	116
Consumer 1-4 Family Mortgage | Closed end first mortgage loans | Total Accruing
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	176,240	613
Consumer 1-4 Family Mortgage | Open end and junior lien loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	157,859
Total Nonaccrual	98	142
Nonaccrual With No Allowance For Credit Loss	98	165,236
Consumer 1-4 Family Mortgage | Open end and junior lien loans | Loans Not Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	157,729	165,094
Consumer 1-4 Family Mortgage | Open end and junior lien loans | 30-89 Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	130	137
Consumer 1-4 Family Mortgage | Open end and junior lien loans | Greater than 89 Days Past Due and Accruing
Financing Receivable, Allowance for Credit Loss [Line Items]
Greater than 89 Days Past Due and Accruing	0	0
Consumer 1-4 Family Mortgage | Open end and junior lien loans | Total Accruing
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	157,761	5
Consumer 1-4 Family Mortgage | Residential construction loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	11,857
Total Nonaccrual	0	0
Nonaccrual With No Allowance For Credit Loss	0	11,962
Consumer 1-4 Family Mortgage | Residential construction loans | Loans Not Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	11,857	11,962
Consumer 1-4 Family Mortgage | Residential construction loans | 30-89 Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	0	0
Consumer 1-4 Family Mortgage | Residential construction loans | Greater than 89 Days Past Due and Accruing
Financing Receivable, Allowance for Credit Loss [Line Items]
Greater than 89 Days Past Due and Accruing	0	0
Consumer 1-4 Family Mortgage | Residential construction loans | Total Accruing
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	11,857	0
Consumer 1-4 Family Mortgage | Other consumer loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Total Nonaccrual		145
Nonaccrual With No Allowance For Credit Loss		103,385
Consumer 1-4 Family Mortgage | Other consumer loans | Loans Not Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans		103,240
Consumer 1-4 Family Mortgage | Other consumer loans | 30-89 Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans		145
Consumer 1-4 Family Mortgage | Other consumer loans | Greater than 89 Days Past Due and Accruing
Financing Receivable, Allowance for Credit Loss [Line Items]
Greater than 89 Days Past Due and Accruing		0
Consumer 1-4 Family Mortgage | Other consumer loans | Total Accruing
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans		$ 0
Consumer 1-4 Family Mortgage | Other consumer loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	82,544
Total Nonaccrual	289
Nonaccrual With No Allowance For Credit Loss	0
Consumer 1-4 Family Mortgage | Other consumer loans | Loans Not Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	82,472
Consumer 1-4 Family Mortgage | Other consumer loans | 30-89 Days Past Due
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	72
Consumer 1-4 Family Mortgage | Other consumer loans | Greater than 89 Days Past Due and Accruing
Financing Receivable, Allowance for Credit Loss [Line Items]
Greater than 89 Days Past Due and Accruing	0
Consumer 1-4 Family Mortgage | Other consumer loans | Total Accruing
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans	$ 82,255