Loans - Non-Accrual Loans, Segregated by Class of Loans (Detail) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Non Accrual Loans Segregated By Class Of Loans [Line Items]
Financing Receivable, Nonaccrual	$ 110,150	$ 70,482
Financing Receivable, Nonaccrual, No Allowance	34,018	38,116
Loans Held For Sale
Non Accrual Loans Segregated By Class Of Loans [Line Items]
Financing Receivable, Nonaccrual	2,567	0
Financing Receivable, Nonaccrual, No Allowance	2,567	0
Commercial Portfolio Segment [Member]
Non Accrual Loans Segregated By Class Of Loans [Line Items]
Financing Receivable, Nonaccrual	23,691	50,659
Financing Receivable, Nonaccrual, No Allowance	11,209	26,693
Commercial and Industrial Total Energy Loans [Member]
Non Accrual Loans Segregated By Class Of Loans [Line Items]
Financing Receivable, Nonaccrual	2,523	3,023
Financing Receivable, Nonaccrual, No Allowance	1,303	1,304
Commercial Real Estate Owner Occupied
Non Accrual Loans Segregated By Class Of Loans [Line Items]
Financing Receivable, Nonaccrual	14,183	7,581
Financing Receivable, Nonaccrual, No Allowance	11,384	4,782
Commercial Real Estate Owner Occupied | Loans Held For Sale
Non Accrual Loans Segregated By Class Of Loans [Line Items]
Financing Receivable, Nonaccrual	2,428	0
Financing Receivable, Nonaccrual, No Allowance	2,428	0
Commercial Real Estate Non-Owner Occupied
Non Accrual Loans Segregated By Class Of Loans [Line Items]
Financing Receivable, Nonaccrual	4,566	465
Financing Receivable, Nonaccrual, No Allowance	4,566	465
Construction Loans [Member]
Non Accrual Loans Segregated By Class Of Loans [Line Items]
Financing Receivable, Nonaccrual	56,054	1,874
Financing Receivable, Nonaccrual, No Allowance	563	202
Construction Loans [Member] | Loans Held For Sale
Non Accrual Loans Segregated By Class Of Loans [Line Items]
Financing Receivable, Nonaccrual	139	0
Financing Receivable, Nonaccrual, No Allowance	139	0
Total consumer real estate loans [Member]
Non Accrual Loans Segregated By Class Of Loans [Line Items]
Financing Receivable, Nonaccrual	8,876	6,615
Financing Receivable, Nonaccrual, No Allowance	4,817	4,486
Consumer Loan [Member]
Non Accrual Loans Segregated By Class Of Loans [Line Items]
Financing Receivable, Nonaccrual	257	265
Financing Receivable, Nonaccrual, No Allowance	$ 176	$ 184