v3.26.3
Loans and Lease Finance Receivables and Allowance for Credit Losses - Schedule of Balance and Activity Related to Allowance for Loan Losses for Held-for-Investment Loans by Type (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Financing Receivable, Allowance for Credit Losses [Line Items]        
Beginning balance $ 126,661 $ 78,003 $ 77,161 $ 80,122
Charge-offs (20) (67) (284) (536)
Recoveries 0 400 136 750
Initial ACL for PCD Loans at Acquisition     46,628  
Provision for (Recapture of) Credit Losses (1,000) 1,000 2,000 (1,000)
Ending balance 125,641 79,336 125,641 79,336
Commercial Real Estate [Member]        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Beginning balance 76,065 64,542 61,661 66,237
Charge-offs 0 0 0 0
Recoveries 0 0 0 0
Initial ACL for PCD Loans at Acquisition     17,401  
Provision for (Recapture of) Credit Losses (655) 852 (3,652) (843)
Ending balance 75,410 65,394 75,410 65,394
Construction Loans [Member]        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Beginning balance 3,056 240 593 312
Charge-offs 0 0 0 0
Recoveries 0 159 0 171
Initial ACL for PCD Loans at Acquisition     1,593  
Provision for (Recapture of) Credit Losses (519) 123 351 39
Ending balance 2,537 522 2,537 522
SBA [Member]        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Beginning balance 4,568 3,066 2,720 2,629
Charge-offs (0) (67) (26) (118)
Recoveries 0 6 8 47
Initial ACL for PCD Loans at Acquisition     1,830  
Provision for (Recapture of) Credit Losses (13) (425) 23 22
Ending balance 4,555 2,580 4,555 2,580
Commercial and Industrial [Member]        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Beginning balance 36,588 6,357 8,438 6,093
Charge-offs (20) (0) (258) (413)
Recoveries 0 235 128 532
Initial ACL for PCD Loans at Acquisition     24,065  
Provision for (Recapture of) Credit Losses (399) 64 3,796 444
Ending balance 36,169 6,656 36,169 6,656
Dairy & Livestock and Agribusiness [Member]        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Beginning balance 3,082 2,554 2,486 3,610
Charge-offs 0 0 0 0
Recoveries 0 0 0 0
Initial ACL for PCD Loans at Acquisition     1  
Provision for (Recapture of) Credit Losses 556 237 1,151 (819)
Ending balance 3,638 2,791 3,638 2,791
Municipal Lease Finance Receivables [Member]        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Beginning balance 222 220 251 205
Charge-offs 0 0 0 0
Recoveries 0 0 0 0
Initial ACL for PCD Loans at Acquisition     0  
Provision for (Recapture of) Credit Losses (12) 4 (41) 19
Ending balance 210 224 210 224
SFR Mortgage [Member]        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Beginning balance 515 477 442 424
Charge-offs 0 0 0 0
Recoveries 0 0 0 0
Initial ACL for PCD Loans at Acquisition     35  
Provision for (Recapture of) Credit Losses 11 16 49 69
Ending balance 526 493 526 493
Consumer and Other Loans [Member]        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Beginning balance 2,565 547 570 612
Charge-offs 0 (0) 0 (5)
Recoveries 0 0 0 0
Initial ACL for PCD Loans at Acquisition     1,703  
Provision for (Recapture of) Credit Losses 31 129 323 69
Ending balance $ 2,596 $ 676 $ 2,596 $ 676