LOANS - Loan Portfolio Segment Balances (Detail) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment	$ 11,537,966	$ 11,366,989
Commercial investor real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment	4,779,593	5,104,425
Commercial owner-occupied real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment	1,748,772	1,755,235
Commercial AD&C
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment	1,327,292	988,967
Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment	1,537,589	1,474,521
Residential construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment	49,028	121,419
Commercial real estate: | Commercial investor real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment	4,779,593	5,104,425
Commercial real estate: | Commercial owner-occupied real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment	1,748,772	1,755,235
Commercial real estate: | Commercial AD&C
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment	1,327,292	988,967
Commercial business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment	9,508,792	9,353,507
Commercial business | Commercial business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment	1,653,135	1,504,880
Total residential and consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment	2,029,174	2,013,482
Residential real estate: | Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment	1,537,589	1,474,521
Residential real estate: | Residential construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment	49,028	121,419
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans held for investment	$ 442,557	$ 417,542