v3.26.3
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
Sep. 30, 2026
Dec. 31, 2025
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due $ 19,930 $ 7,863
Current 12,122,015 8,699,193
Total Loans and Financing Receivables 12,122,015 8,699,193
Nonaccrual with No Allowance for Credit Losses 10,825 4,685
Total Nonaccrual 18,725 [1],[2],[3] 4,685 [4],[5]
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 3,062 3,178
Total Nonaccrual 30,000  
60-89 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 2,688 0
Total Nonaccrual 32,000  
Greater than 89 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 14,180 4,685
Total Nonaccrual 14,200 4,700
Financial Asset Not Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current 12,102,085 8,691,330
Commercial Real Estate Owner Occupied [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 8,631 2,930
Total Loans and Financing Receivables 2,846,003 2,333,241
Nonaccrual with No Allowance for Credit Losses 4,299 43
Total Nonaccrual 4,299 [1],[2],[3] 43 [4],[5]
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 2,532 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 2,049 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 4,050 43
Commercial Real Estate Owner Occupied [Member] | Financial Asset Not Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current 2,837,372 2,330,311
Commercial Real Estate Non-owner Occupied [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 0 4,143
Total Loans and Financing Receivables 6,186,738 4,241,154
Nonaccrual with No Allowance for Credit Losses   4,143
Total Nonaccrual [4],[5]   4,143
Loans Past Due Over 89 Days Still Accruing   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 0 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 0 4,143
Commercial Real Estate Non-owner Occupied [Member] | Financial Asset Not Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current 6,186,738 4,237,011
Construction Speculative [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due [3] 685 0
Total Loans and Financing Receivables [3] 122,107 12,151
Nonaccrual with No Allowance for Credit Losses [6] 685  
Total Nonaccrual [1],[2],[3],[6] 685  
Construction Speculative [Member] | 30-59 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due [3] 0 0
Construction Speculative [Member] | 60-89 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due [3] 0 0
Construction Speculative [Member] | Greater than 89 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due [3] 685 0
Construction Speculative [Member] | Financial Asset Not Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current [3] 121,422 12,151
Construction Non-speculative [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 0 0
Total Loans and Financing Receivables 106,939 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 106,939 25,661
SBA [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 2,663 51
Total Loans and Financing Receivables 470,293 282,401
Nonaccrual with No Allowance for Credit Losses 1,975 21
Total Nonaccrual 2,652 [1],[2],[3] 21 [4],[5]
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 0 30
SBA [Member] | 60-89 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 11 0
SBA [Member] | Greater than 89 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 2,652 21
SBA [Member] | Financial Asset Not Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current 467,630 282,350
Commercial and Industrial [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 7,230 739
Total Loans and Financing Receivables 1,439,834 973,631
Nonaccrual with No Allowance for Credit Losses 3,291 478
Total Nonaccrual 10,514 [1],[2],[3] 478 [4],[5]
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 530 261
Commercial and Industrial [Member] | 60-89 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 32 0
Commercial and Industrial [Member] | Greater than 89 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 6,668 478
Commercial and Industrial [Member] | Financial Asset Not Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current 1,432,604 972,892
Dairy & Livestock and Agribusiness [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 0 0
Total Loans and Financing Receivables 341,801 431,577
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 341,801 431,577
Municipal Lease Finance Receivables [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 0 0
Current 53,800 59,542
Total Loans and Financing Receivables 53,800 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 53,800 59,542
SFR Mortgage [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 596 0
Total Loans and Financing Receivables 338,394 281,766
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 596 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 337,798 281,766
Consumer and Other Loans [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 125 0
Total Loans and Financing Receivables 216,106 58,069
Nonaccrual with No Allowance for Credit Losses 575  
Total Nonaccrual [1],[2],[3] 575  
Consumer and Other Loans [Member] | 30-59 Days Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Past Due 0 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 125 0
Consumer and Other Loans [Member] | Financial Asset Not Past Due [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current $ 215,981 $ 58,069
[1] As of September 30, 2026, $4.5 million of nonaccruing loans were current, $30,000 were 30-59 days past due, $32,000 were 60-89 days past due, and $14.2 million were 90+ days past due.
[2] Excludes $35,000 of guaranteed portion of nonaccrual SBA loans that are in process of collection.
[3] Speculative construction loans are generally for properties where there is no identified buyer or renter.
[4] As of December 31, 2025, $4.7 million were 90+ days past due.
[5] Excludes $3,000 of guaranteed portion of nonaccrual SBA loans that are in process of collection.
[6] Speculative construction loans are generally for properties where there is no identified buyer or renter.