LOANS AND ALLOWANCE - Amortized Cost Basis of Collateral Dependent Loans (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	$ 83,479		$ 78,302
Allowance on Collateral Dependent Loans	221,147	$ 223,052	223,277	$ 226,275	$ 195,984	$ 195,397
Commercial and industrial loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	51,674		42,101
Construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	9		10
Commercial real estate, non-owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	18,508		26,534
Commercial real estate, owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	11,448		6,986
Residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	1,562		2,382
Home equity
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	278		289
Commercial Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	29,956		33,520
Commercial Real Estate | Commercial and industrial loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	0		0
Commercial Real Estate | Construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	0		0
Commercial Real Estate | Commercial real estate, non-owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	18,508		26,534
Commercial Real Estate | Commercial real estate, owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	11,448		6,986
Commercial Real Estate | Residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	0		0
Commercial Real Estate | Home equity
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	0		0
Residential Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	1,849		2,681
Residential Real Estate | Commercial and industrial loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	0		0
Residential Real Estate | Construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	9		10
Residential Real Estate | Commercial real estate, non-owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	0		0
Residential Real Estate | Commercial real estate, owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	0		0
Residential Real Estate | Residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	1,562		2,382
Residential Real Estate | Home equity
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	278		289
Other
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	51,674		42,101
Other | Commercial and industrial loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	51,674		42,101
Other | Construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	0		0
Other | Commercial real estate, non-owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	0		0
Other | Commercial real estate, owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	0		0
Other | Residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	0		0
Other | Home equity
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually evaluated for impairment	0		0
Allowance on Collateral Dependent Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance on Collateral Dependent Loans	20,068		11,512
Allowance on Collateral Dependent Loans | Commercial and industrial loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in individually evaluated for impairment	9,600
Net recoveries	10,900
Allowance on Collateral Dependent Loans	19,282		8,367
Allowance on Collateral Dependent Loans | Construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance on Collateral Dependent Loans	1		1
Allowance on Collateral Dependent Loans | Commercial real estate, non-owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in individually evaluated for impairment	8,000
Net recoveries	1,900
Allowance on Collateral Dependent Loans	160		2,064
Allowance on Collateral Dependent Loans | Commercial real estate, owner occupied
Financing Receivable, Allowance for Credit Loss [Line Items]
Increase (decrease) in individually evaluated for impairment	4,500
Allowance on Collateral Dependent Loans	337		776
Allowance on Collateral Dependent Loans | Residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance on Collateral Dependent Loans	247		260
Allowance on Collateral Dependent Loans | Home equity
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance on Collateral Dependent Loans	$ 41		$ 44