LOANS (Allowance for credit losses on financing receivables) (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually Evaluated for Credit Losses	$ 7,753		$ 7,646
Collectively Evaluated for Credit Losses	97,962		102,442
Total	105,715	$ 101,353	110,088	$ 117,533	$ 120,726	$ 131,606
Loans Individually Evaluated for Credit Losses	51,702		49,288
Loans Collectively Evaluated for Credit Losses	10,871,830		9,905,284
Total	10,923,532		9,954,572
Commercial and industrial | Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually Evaluated for Credit Losses	7,260		4,562
Collectively Evaluated for Credit Losses	23,003		23,176
Total	30,263	27,668	27,738	27,908	31,332	38,818
Loans Individually Evaluated for Credit Losses	21,696		13,551
Loans Collectively Evaluated for Credit Losses	3,257,007		2,631,534
Total	3,278,703		2,645,085
Commercial and industrial | Paycheck Protection Program ("PPP")
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually Evaluated for Credit Losses	0		0
Collectively Evaluated for Credit Losses	0		0
Total	0		0
Loans Individually Evaluated for Credit Losses	0		0
Loans Collectively Evaluated for Credit Losses	13,506		199,883
Total	13,506		199,883
Commercial and industrial | Owner occupied commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually Evaluated for Credit Losses	365		105
Collectively Evaluated for Credit Losses	16,607		19,109
Total	16,972	17,658	19,214	19,128	19,990	20,001
Loans Individually Evaluated for Credit Losses	8,851		8,552
Loans Collectively Evaluated for Credit Losses	2,277,122		2,231,782
Total	2,285,973		2,240,334
Commercial and industrial | Non-owner occupied commercial real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually Evaluated for Credit Losses	0		610
Collectively Evaluated for Credit Losses	14,809		17,298
Total	14,809	15,738	17,908	22,115	22,828	20,873
Loans Individually Evaluated for Credit Losses	11,643		12,557
Loans Collectively Evaluated for Credit Losses	2,207,899		1,998,034
Total	2,219,542		2,010,591
Commercial and industrial | Real estate construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually Evaluated for Credit Losses	0		0
Collectively Evaluated for Credit Losses	24,270		22,538
Total	24,270	19,391	22,538	23,698	19,580	20,080
Loans Individually Evaluated for Credit Losses	1,547		0
Loans Collectively Evaluated for Credit Losses	994,470		856,119
Total	996,017		856,119
Agricultural and agricultural real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually Evaluated for Credit Losses	128		2,369
Collectively Evaluated for Credit Losses	2,439		2,844
Total	2,567	2,948	5,213	6,326	7,160	7,129
Loans Individually Evaluated for Credit Losses	6,343		13,773
Loans Collectively Evaluated for Credit Losses	775,011		739,980
Total	781,354		753,753
Residential real estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually Evaluated for Credit Losses	0		0
Collectively Evaluated for Credit Losses	7,426		8,427
Total	7,426	8,571	8,427	9,238	9,741	11,935
Loans Individually Evaluated for Credit Losses	1,622		855
Loans Collectively Evaluated for Credit Losses	851,306		828,428
Total	852,928		829,283
Consumer
Financing Receivable, Allowance for Credit Loss [Line Items]
Individually Evaluated for Credit Losses	0		0
Collectively Evaluated for Credit Losses	9,408		9,050
Total	9,408	$ 9,379	9,050	$ 9,120	$ 10,095	$ 12,770
Loans Individually Evaluated for Credit Losses	0		0
Loans Collectively Evaluated for Credit Losses	495,509		419,524
Total	$ 495,509		$ 419,524