SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Impact of Adoption of the ASU (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Jan. 01, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Valuation allowance after adoption of ASC 326	$ 67,773		$ 61,408	$ 50,652	$ 48,453
Commercial and Industrial
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Valuation allowance after adoption of ASC 326			28,333
Commercial Real Estate and Multi-family Residential
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Valuation allowance after adoption of ASC 326			22,907
Agri-business and Agricultural
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Valuation allowance after adoption of ASC 326			3,043
Consumer 1-4 Family Mortgage
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Valuation allowance after adoption of ASC 326			2,619
Unallocated
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Valuation allowance after adoption of ASC 326	$ 450		3,139	$ 2,320	$ 3,294
Pre-ASC 326 Adoption | ASU 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Pre-ASC 326 Adoption		$ 61,408
Pre-ASC 326 Adoption | Commercial and Industrial | ASU 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Pre-ASC 326 Adoption		28,333
Pre-ASC 326 Adoption | Commercial Real Estate and Multi-family Residential | ASU 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Pre-ASC 326 Adoption		22,907
Pre-ASC 326 Adoption | Agri-business and Agricultural | ASU 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Pre-ASC 326 Adoption		3,043
Pre-ASC 326 Adoption | Other commercial loans | ASU 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Pre-ASC 326 Adoption		416
Pre-ASC 326 Adoption | Consumer 1-4 Family Mortgage | ASU 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Pre-ASC 326 Adoption		2,619
Pre-ASC 326 Adoption | Other consumer loans | ASU 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Pre-ASC 326 Adoption		951
Pre-ASC 326 Adoption | Unallocated | ASU 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Pre-ASC 326 Adoption		3,139
As Reported Under ASC 326 | As Reported Under ASC 326
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Valuation allowance after adoption of ASC 326		70,458
As Reported Under ASC 326 | As Reported Under ASC 326 | Commercial and Industrial
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Valuation allowance after adoption of ASC 326		32,645
As Reported Under ASC 326 | As Reported Under ASC 326 | Commercial Real Estate and Multi-family Residential
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Valuation allowance after adoption of ASC 326		27,223
As Reported Under ASC 326 | As Reported Under ASC 326 | Agri-business and Agricultural
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Valuation allowance after adoption of ASC 326		4,103
As Reported Under ASC 326 | As Reported Under ASC 326 | Other commercial loans
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Valuation allowance after adoption of ASC 326		1,357
As Reported Under ASC 326 | As Reported Under ASC 326 | Consumer 1-4 Family Mortgage
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Valuation allowance after adoption of ASC 326		3,572
As Reported Under ASC 326 | As Reported Under ASC 326 | Other consumer loans
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Valuation allowance after adoption of ASC 326		1,300
As Reported Under ASC 326 | As Reported Under ASC 326 | Unallocated
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Valuation allowance after adoption of ASC 326		258
Impact of ASC 326 Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Valuation allowance after adoption of ASC 326		9,050	9,050
Impact of ASC 326 Adoption | ASU 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Valuation allowance after adoption of ASC 326		9,100
Impact of ASC 326 Adoption | Commercial and Industrial
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Valuation allowance after adoption of ASC 326		4,312
Impact of ASC 326 Adoption | Commercial Real Estate and Multi-family Residential
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Valuation allowance after adoption of ASC 326		4,316
Impact of ASC 326 Adoption | Agri-business and Agricultural
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Valuation allowance after adoption of ASC 326		1,060
Impact of ASC 326 Adoption | Other commercial loans
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Valuation allowance after adoption of ASC 326		941
Impact of ASC 326 Adoption | Consumer 1-4 Family Mortgage
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Valuation allowance after adoption of ASC 326		953
Impact of ASC 326 Adoption | Other consumer loans
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Valuation allowance after adoption of ASC 326		349
Impact of ASC 326 Adoption | Unallocated
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Valuation allowance after adoption of ASC 326		$ (2,881)	$ (2,881)