LOANS AND ALLOWANCE FOR LOAN AND LEASE LOSSES (Schedule of Stated at Face Amount, Net of Unearned Income) (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022
Loans and Leases Receivable Disclosure [Line Items]
LHFI, net of deferred fees and costs	$ 18,347,190		$ 15,635,043
Total Allowance for credit losses	(158,131)	$ (136,190)	(132,182)	$ (120,683)	$ (116,512)	$ (110,768)
Total loans held for investment, net	18,189,059		15,502,861
Loans receivable, deferred fees and costs	241,400		79,700
Construction Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
LHFI, net of deferred fees and costs	1,454,545		1,107,850
CRE - Owner Occupied
Loans and Leases Receivable Disclosure [Line Items]
LHFI, net of deferred fees and costs	2,397,700		1,998,787
CRE - Non-Owner Occupied
Loans and Leases Receivable Disclosure [Line Items]
LHFI, net of deferred fees and costs	4,906,285		4,172,401
Multifamily Real Estate
Loans and Leases Receivable Disclosure [Line Items]
LHFI, net of deferred fees and costs	1,353,024		1,061,997
Commercial and Industrial
Loans and Leases Receivable Disclosure [Line Items]
LHFI, net of deferred fees and costs	3,944,723		3,589,347
Residential 1-4 Family - Commercial
Loans and Leases Receivable Disclosure [Line Items]
LHFI, net of deferred fees and costs	737,687		522,580
Residential 1-4 Family - Mortgage
Loans and Leases Receivable Disclosure [Line Items]
LHFI, net of deferred fees and costs	1,251,033		1,078,173
Residential 1-4 Family - Revolving
Loans and Leases Receivable Disclosure [Line Items]
LHFI, net of deferred fees and costs	718,491		619,433
Automobile Loan [Member]
Loans and Leases Receivable Disclosure [Line Items]
LHFI, net of deferred fees and costs	396,776		486,926
Consumer
Loans and Leases Receivable Disclosure [Line Items]
LHFI, net of deferred fees and costs	115,541		120,641
Other Commercial
Loans and Leases Receivable Disclosure [Line Items]
LHFI, net of deferred fees and costs	$ 1,071,385		$ 876,908