LOANS (Not Covered by Share Agreements (Past Due Financing Receivables)) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	$ 58,231	$ 69,369
Loans receivable held to maturity	11,428,352	9,954,572
Financial Asset, Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	5,039	7,912
30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	3,907	7,026
60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	859	336
90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	273	550
Financial Asset, Not Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	11,365,082	9,877,291
Commercial and industrial | Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	22,766	18,228
Loans receivable held to maturity	3,464,414	2,645,085
Commercial and industrial | Paycheck Protection Program ("PPP")
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	19	0
Loans receivable held to maturity	11,025	199,883
Commercial and industrial | Owner occupied commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	8,803	11,150
Loans receivable held to maturity	2,265,307	2,240,334
Commercial and industrial | Non-owner occupied commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	11,658	13,316
Loans receivable held to maturity	2,330,940	2,010,591
Commercial and industrial | Real estate construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	2,351	368
Loans receivable held to maturity	1,076,082	856,119
Commercial and industrial | Financial Asset, Past Due | Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	1,586	1,748
Commercial and industrial | Financial Asset, Past Due | Paycheck Protection Program ("PPP")
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	0	0
Commercial and industrial | Financial Asset, Past Due | Owner occupied commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	139	130
Commercial and industrial | Financial Asset, Past Due | Non-owner occupied commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	0	3,929
Commercial and industrial | Financial Asset, Past Due | Real estate construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	44	288
Commercial and industrial | 30-59 Days Past Due | Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	1,099	1,024
Commercial and industrial | 30-59 Days Past Due | Paycheck Protection Program ("PPP")
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	0	0
Commercial and industrial | 30-59 Days Past Due | Owner occupied commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	12	130
Commercial and industrial | 30-59 Days Past Due | Non-owner occupied commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	0	3,929
Commercial and industrial | 30-59 Days Past Due | Real estate construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	16	238
Commercial and industrial | 60-89 Days Past Due | Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	356	183
Commercial and industrial | 60-89 Days Past Due | Paycheck Protection Program ("PPP")
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	0	0
Commercial and industrial | 60-89 Days Past Due | Owner occupied commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	127	0
Commercial and industrial | 60-89 Days Past Due | Non-owner occupied commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	0	0
Commercial and industrial | 60-89 Days Past Due | Real estate construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	28	50
Commercial and industrial | 90 Days or More Past Due | Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	131	541
Commercial and industrial | 90 Days or More Past Due | Paycheck Protection Program ("PPP")
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	0	0
Commercial and industrial | 90 Days or More Past Due | Owner occupied commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	0	0
Commercial and industrial | 90 Days or More Past Due | Non-owner occupied commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	0	0
Commercial and industrial | 90 Days or More Past Due | Real estate construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	0	0
Commercial and industrial | Financial Asset, Not Past Due | Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	3,440,062	2,625,109
Commercial and industrial | Financial Asset, Not Past Due | Paycheck Protection Program ("PPP")
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	11,006	199,883
Commercial and industrial | Financial Asset, Not Past Due | Owner occupied commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	2,256,365	2,229,054
Commercial and industrial | Financial Asset, Not Past Due | Non-owner occupied commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	2,319,282	1,993,346
Commercial and industrial | Financial Asset, Not Past Due | Real estate construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	1,073,687	855,463
Agricultural and agricultural real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	6,232	15,686
Loans receivable held to maturity	920,510	753,753
Agricultural and agricultural real estate | Financial Asset, Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	190	687
Agricultural and agricultural real estate | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	48	687
Agricultural and agricultural real estate | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	0	0
Agricultural and agricultural real estate | 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	142	0
Agricultural and agricultural real estate | Financial Asset, Not Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	914,088	737,380
Residential real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	5,264	9,167
Loans receivable held to maturity	853,361	829,283
Residential real estate | Financial Asset, Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	1,358	822
Residential real estate | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	1,206	767
Residential real estate | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	152	46
Residential real estate | 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	0	9
Residential real estate | Financial Asset, Not Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	846,739	819,294
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	1,138	1,454
Loans receivable held to maturity	506,713	419,524
Consumer | Financial Asset, Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	1,722	308
Consumer | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	1,526	251
Consumer | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	196	57
Consumer | 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	0	0
Consumer | Financial Asset, Not Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans receivable held to maturity	$ 503,853	$ 417,762