LOANS AND ALLOWANCE FOR LOAN AND LEASE LOSSES (Loans Stated at Face Amount, Net of Unearned Income) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Loans and Leases Receivable Disclosure [Line Items]
LHFI, net of deferred fees and costs	$ 15,635,043	$ 14,449,142
Total Allowance for credit losses	(132,182)	(110,768)	$ (99,787)
Total loans held for investment, net	15,502,861	14,338,374
Loans receivable, deferred fees and costs	79,700	50,400
Construction and Land Development
Loans and Leases Receivable Disclosure [Line Items]
LHFI, net of deferred fees and costs	1,107,850	1,101,260
Commercial Real Estate - Owner Occupied
Loans and Leases Receivable Disclosure [Line Items]
LHFI, net of deferred fees and costs	1,998,787	1,982,608
Commercial Real Estate - Non-Owner Occupied
Loans and Leases Receivable Disclosure [Line Items]
LHFI, net of deferred fees and costs	4,172,401	3,996,130
Multifamily Real Estate
Loans and Leases Receivable Disclosure [Line Items]
LHFI, net of deferred fees and costs	1,061,997	802,923
Commercial and Industrial
Loans and Leases Receivable Disclosure [Line Items]
LHFI, net of deferred fees and costs	3,589,347	2,983,349
Residential 1-4 Family - Commercial
Loans and Leases Receivable Disclosure [Line Items]
LHFI, net of deferred fees and costs	522,580	538,063
Residential 1-4 Family - Mortgage
Loans and Leases Receivable Disclosure [Line Items]
LHFI, net of deferred fees and costs	1,078,173	940,275
Residential 1-4 Family - Revolving
Loans and Leases Receivable Disclosure [Line Items]
LHFI, net of deferred fees and costs	619,433	585,184
Auto
Loans and Leases Receivable Disclosure [Line Items]
LHFI, net of deferred fees and costs	486,926	592,976
Consumer
Loans and Leases Receivable Disclosure [Line Items]
LHFI, net of deferred fees and costs	120,641	152,545
Other Commercial
Loans and Leases Receivable Disclosure [Line Items]
LHFI, net of deferred fees and costs	$ 876,908	$ 773,829