LOANS AND ALLOWANCE FOR CREDIT LOSSES - Narrative (Details)	1 Months Ended	3 Months Ended
	Apr. 30, 2025 USD ($)	Mar. 31, 2025 USD ($) loan_segment	Mar. 31, 2024 USD ($)	Dec. 31, 2024 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for sale		$ 23,004,000		$ 18,663,000
Loans		13,004,905,000		12,854,359,000
Interest income recognized on non-accrual loans		0	$ 0
Payment default		$ 9,500,000	1,700,000
Number of loan segments | loan_segment		10
Allowance for credit losses increase (decrease)		$ (700,000)
Net charge-offs		(4,900,000)
Provision for credit losses		$ 4,200,000	2,000,000
Standby letters of credit usual term		2 years
Increase (decrease) in provision		$ 0	$ 0
Off-balance sheet commitments		18,000,000		18,000,000
Commercial real estate, non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		2,177,869,000		2,274,016,000
Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		4,306,597,000		4,114,292,000
Increase (decrease) in past due loans		20,600,000
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		793,175,000		792,144,000
Construction | Subsequent Event
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual status principal payment received	$ 22,000,000
Individuals' loans for household and other personal expenditures
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		140,954,000		166,028,000
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		2,389,852,000		2,374,729,000
Commercial real estate, owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		1,214,739,000		1,157,944,000
Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		140,000,000		116,200,000
Increase (decrease) in past due loans		23,800,000
30-59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		37,640,000		35,773,000
Increase (decrease) in past due loans		1,800,000
30-59 Days Past Due | Commercial real estate, non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		4,878,000		2,407,000
30-59 Days Past Due | Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		13,082,000		7,428,000
30-59 Days Past Due | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		35,000		4,332,000
30-59 Days Past Due | Individuals' loans for household and other personal expenditures
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		908,000		926,000
30-59 Days Past Due | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		12,758,000		12,302,000
30-59 Days Past Due | Commercial real estate, owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		2,020,000		3,783,000
60-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		53,214,000		32,581,000
60-89 Days Past Due | Commercial real estate, non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		1,869,000		1,718,000
Increase (decrease) in past due loans		25,100,000
60-89 Days Past Due | Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		25,602,000		473,000
60-89 Days Past Due | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		15,226,000		22,005,000
Increase (decrease) in past due loans		(6,800,000)
60-89 Days Past Due | Individuals' loans for household and other personal expenditures
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		192,000		210,000
60-89 Days Past Due | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		5,027,000		6,606,000
60-89 Days Past Due | Commercial real estate, owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		4,496,000		0
Increase (decrease) in past due loans		4,500,000
90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		49,176,000		47,809,000
Increase (decrease) in past due loans		1,400,000
90 Days or More Past Due | Commercial real estate, non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		11,623,000		10,342,000
90 Days or More Past Due | Commercial and industrial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		7,200,000		9,786,000
90 Days or More Past Due | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		285,000		3,988,000
90 Days or More Past Due | Individuals' loans for household and other personal expenditures
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		0		1,000
90 Days or More Past Due | Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		19,794,000		18,819,000
90 Days or More Past Due | Commercial real estate, owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		$ 5,508,000		$ 300,000