v3.26.1
Loans and Lease Finance Receivables and Allowance for Credit Losses - Schedule of Recorded Investment in, and Aging of, Past Due and Nonaccrual Loans, Including PCI Loans by Class of Loans (Detail) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due $ 13,674 $ 7,863
Current 12,017,055 8,699,193
Total Loans and Financing Receivables 12,017,055 8,699,193
Nonaccrual with No Allowance for Credit Losses 9,821 4,685
Total Nonaccrual 16,642 [1],[2] 4,685 [3],[4]
Loans Past Due Over 89 Days Still Accruing 0 0
30-59 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 3,776 3,178
Total Nonaccrual 670,000  
60-89 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 2,087 0
Total Nonaccrual 1,400  
Greater than 89 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 7,811 4,685
Total Nonaccrual 7,800 4,700
Financial Asset Not Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current 12,003,381 8,691,330
Commercial Real Estate Owner Occupied [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 6,867 2,930
Total Loans and Financing Receivables 2,850,570 2,333,241
Nonaccrual with No Allowance for Credit Losses 4,496 43
Total Nonaccrual 4,745 [1],[2] 43 [3],[4]
Loans Past Due Over 89 Days Still Accruing 0 0
Commercial Real Estate Owner Occupied [Member] | 30-59 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 2,122 2,887
Commercial Real Estate Owner Occupied [Member] | 60-89 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 0 0
Commercial Real Estate Owner Occupied [Member] | Greater than 89 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 4,745 43
Commercial Real Estate Owner Occupied [Member] | Financial Asset Not Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current 2,843,703 2,330,311
Commercial Real Estate Non-owner Occupied [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 800 4,143
Total Loans and Financing Receivables 6,133,364 4,241,154
Nonaccrual with No Allowance for Credit Losses 160 4,143
Total Nonaccrual 160 [1],[2] 4,143 [3],[4]
Loans Past Due Over 89 Days Still Accruing 0 0
Commercial Real Estate Non-owner Occupied [Member] | 30-59 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 0 0
Commercial Real Estate Non-owner Occupied [Member] | 60-89 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 640 0
Commercial Real Estate Non-owner Occupied [Member] | Greater than 89 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 160 4,143
Commercial Real Estate Non-owner Occupied [Member] | Financial Asset Not Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current 6,132,564 4,237,011
Construction Speculative [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due [5] 685 0
Total Loans and Financing Receivables [5] 117,646 12,151
Nonaccrual with No Allowance for Credit Losses [6] 685  
Total Nonaccrual [1],[2],[6] 685  
Construction Speculative [Member] | 30-59 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due [5] 0 0
Construction Speculative [Member] | 60-89 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due [5] 0 0
Construction Speculative [Member] | Greater than 89 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due [5] 685 0
Construction Speculative [Member] | Financial Asset Not Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current [5] 116,961 12,151
Construction Non-speculative [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 0 0
Total Loans and Financing Receivables 92,347 25,661
Construction Non-speculative [Member] | 30-59 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 0 0
Construction Non-speculative [Member] | 60-89 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 0 0
Construction Non-speculative [Member] | Greater than 89 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 0 0
Construction Non-speculative [Member] | Financial Asset Not Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current 92,347 25,661
SBA [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 1,703 51
Total Loans and Financing Receivables 441,571 282,401
Nonaccrual with No Allowance for Credit Losses 591 21
Total Nonaccrual 918 [1],[2] 21 [3],[4]
Loans Past Due Over 89 Days Still Accruing 0 0
SBA [Member] | 30-59 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 785 30
SBA [Member] | 60-89 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 0 0
SBA [Member] | Greater than 89 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 918 21
SBA [Member] | Financial Asset Not Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current 439,868 282,350
Commercial and Industrial [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 3,496 739
Total Loans and Financing Receivables 1,478,885 973,631
Nonaccrual with No Allowance for Credit Losses 3,427 478
Total Nonaccrual 9,672 [1],[2] 478 [3],[4]
Loans Past Due Over 89 Days Still Accruing 0 0
Commercial and Industrial [Member] | 30-59 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 746 261
Commercial and Industrial [Member] | 60-89 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 1,447 0
Commercial and Industrial [Member] | Greater than 89 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 1,303 478
Commercial and Industrial [Member] | Financial Asset Not Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current 1,475,389 972,892
Dairy & Livestock and Agribusiness [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 0 0
Total Loans and Financing Receivables 280,994 431,577
Dairy & Livestock and Agribusiness [Member] | 30-59 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 0 0
Dairy & Livestock and Agribusiness [Member] | 60-89 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 0 0
Dairy & Livestock and Agribusiness [Member] | Greater than 89 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 0 0
Dairy & Livestock and Agribusiness [Member] | Financial Asset Not Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current 280,994 431,577
Municipal Lease Finance Receivables [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 0 0
Current 56,086 59,542
Total Loans and Financing Receivables 56,086 59,542
Municipal Lease Finance Receivables [Member] | 30-59 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 0 0
Municipal Lease Finance Receivables [Member] | 60-89 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 0 0
Municipal Lease Finance Receivables [Member] | Greater than 89 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 0 0
Municipal Lease Finance Receivables [Member] | Financial Asset Not Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current 56,086 59,542
SFR Mortgage [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 0 0
Total Loans and Financing Receivables 341,340 281,766
SFR Mortgage [Member] | 30-59 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 0 0
SFR Mortgage [Member] | 60-89 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 0 0
SFR Mortgage [Member] | Greater than 89 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 0 0
SFR Mortgage [Member] | Financial Asset Not Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current 341,340 281,766
Consumer and Other Loans [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 123 0
Total Loans and Financing Receivables 224,252 58,069
Nonaccrual with No Allowance for Credit Losses 462  
Total Nonaccrual [1],[2] 462  
Consumer and Other Loans [Member] | 30-59 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 123 0
Consumer and Other Loans [Member] | 60-89 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 0 0
Consumer and Other Loans [Member] | Greater than 89 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 0 0
Consumer and Other Loans [Member] | Financial Asset Not Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current $ 224,129 $ 58,069
[1] As of June 30, 2026, $6.7 million of nonaccruing loans were current, $670,000 were 30-59 days past due, $1.4 million were 60-89 days past due, and $7.8 million were 90+ days past due.
[2] Excludes $3,000 of guaranteed portion of nonaccrual SBA loans that are in process of collection.
[3] As of December 31, 2025, $4.7 million were 90+ days past due.
[4] Excludes $3,000 of guaranteed portion of nonaccrual SBA loans that are in process of collection.
[5] Speculative construction loans are generally for properties where there is no identified buyer or renter.
[6] Speculative construction loans are generally for properties where there is no identified buyer or renter.