LOANS AND ALLOWANCE - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Jun. 30, 2022	Apr. 01, 2022	Dec. 31, 2021	Jan. 01, 2021
Receivables [Abstract]
Loans held for sale	$ 25,394,000		$ 25,394,000				$ 11,187,000
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	11,650,002,000		11,650,002,000				9,241,861,000
Loans with an origination year of 2021	2,805,112,000		2,805,112,000				2,456,983,000
Loans with an origination year of 2020	2,067,592,000		2,067,592,000				778,086,000
Interest income recognized on non-accrual loans	0	$ 0	0	$ 0
Allowance for credit losses increased	427,000		31,300,000
Allowance for credit losses on PCD loans			16,599,000
CECL Day 1 non-PCD provision for credit losses			13,955,000
Net recoveries	$ 427,000		$ 751,000
Standby letters of credit usual term	2 years		2 years
Off-balance sheet commitments	$ 23,300,000		$ 23,300,000		$ 20,500,000
CECL Day 1 unfunded commitments provision for credit losses	2,800,000
Allowance on Collateral Dependent Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Increase in individually evaluated for impairment			46,200,000
Cumulative effect of ASC 326 adoption
Accounts, Notes, Loans and Financing Receivable [Line Items]
Off-balance sheet commitments								$ 20,500,000
Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	37,900,000		37,900,000				34,700,000
Increase (decrease) in past due loans			3,200,000
PPP loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	11,200,000		11,200,000				106,600,000
Loans with an origination year of 2021	11,100,000		11,100,000				100,300,000
Loans with an origination year of 2020	156,000		156,000				6,300,000
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,990,668,000		1,990,668,000				1,159,127,000
Loans with an origination year of 2021	501,954,000		501,954,000				356,660,000
Loans with an origination year of 2020	418,980,000		418,980,000				104,819,000
Increase (decrease) in past due loans			$ 5,600,000
Percentage of troubled debt restructured loans			100.00%
Mortgage loans with formal foreclosure proceedings	2,000,000	$ 3,900,000	$ 2,000,000	$ 3,900,000
Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	621,619,000		621,619,000				523,754,000
Loans with an origination year of 2021	77,715,000		77,715,000				17,641,000
Loans with an origination year of 2020	18,398,000		18,398,000				2,025,000
Increase (decrease) in past due loans			2,800,000
Commercial real estate, non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	2,299,272,000		2,299,272,000				2,135,459,000
Loans with an origination year of 2021	620,181,000		620,181,000				852,798,000
Loans with an origination year of 2020	$ 660,713,000		660,713,000				$ 227,510,000
Increase (decrease) in past due loans			(5,600,000)
Percentage of troubled debt restructured loans		99.90%		92.30%
Level One
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for credit losses on PCD loans			16,600,000
CECL Day 1 non-PCD provision for credit losses			14,000,000
CECL Day 1 unfunded commitments provision for credit losses			$ 2,800,000
Loans						$ 1,626,857,000
Level One | PPP loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans						$ 43,500,000