v3.26.1
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 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Financing Receivable, Allowance for Credit Losses [Line Items]        
Beginning balance $ 80,170 $ 78,252 $ 77,161 $ 80,122
Charge-offs (141) (429) (264) (469)
Recoveries 4 180 136 350
Initial ACL for PCD Loans at Acquisition 46,628   46,628  
Provision for (Recapture of) Credit Losses 0 0 3,000 (2,000)
Ending balance 126,661 78,003 126,661 78,003
Commercial Real Estate [Member]        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Beginning balance 59,323 65,302 61,661 66,237
Charge-offs 0 0 0 0
Recoveries 0 0 0 0
Initial ACL for PCD Loans at Acquisition 17,401   17,401  
Provision for (Recapture of) Credit Losses (659) (760) (2,997) (1,695)
Ending balance 76,065 64,542 76,065 64,542
Construction Loans [Member]        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Beginning balance 816 238 593 312
Charge-offs 0 0 0 0
Recoveries 0 6 0 12
Initial ACL for PCD Loans at Acquisition 1,593   1,593  
Provision for (Recapture of) Credit Losses 647 (4) 870 (84)
Ending balance 3,056 240 3,056 240
SBA [Member]        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Beginning balance 2,821 2,608 2,720 2,629
Charge-offs (26) (32) (26) (51)
Recoveries 4 19 8 41
Initial ACL for PCD Loans at Acquisition 1,830   1,830  
Provision for (Recapture of) Credit Losses (61) 471 36 447
Ending balance 4,568 3,066 4,568 3,066
Commercial and Industrial [Member]        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Beginning balance 12,544 6,118 8,438 6,093
Charge-offs (115) (392) (238) (413)
Recoveries 0 155 128 297
Initial ACL for PCD Loans at Acquisition 24,065   24,065  
Provision for (Recapture of) Credit Losses 94 476 4,195 380
Ending balance 36,588 6,357 36,588 6,357
Dairy & Livestock and Agribusiness [Member]        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Beginning balance 3,348 2,824 2,486 3,610
Charge-offs 0 0 0 0
Recoveries 0 0 0 0
Initial ACL for PCD Loans at Acquisition 1   1  
Provision for (Recapture of) Credit Losses (267) (270) 595 (1,056)
Ending balance 3,082 2,554 3,082 2,554
Municipal Lease Finance Receivables [Member]        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Beginning balance 264 210 251 205
Charge-offs 0 0 0 0
Recoveries 0 0 0 0
Initial ACL for PCD Loans at Acquisition 0   0  
Provision for (Recapture of) Credit Losses (42) 10 (29) 15
Ending balance 222 220 222 220
SFR Mortgage [Member]        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Beginning balance 457 427 442 424
Charge-offs 0 0 0 0
Recoveries 0 0 0 0
Initial ACL for PCD Loans at Acquisition 35   35  
Provision for (Recapture of) Credit Losses 23 50 38 53
Ending balance 515 477 515 477
Consumer and Other Loans [Member]        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Beginning balance 597 525 570 612
Charge-offs 0 (5) 0 (5)
Recoveries 0 0 0 0
Initial ACL for PCD Loans at Acquisition 1,703   1,703  
Provision for (Recapture of) Credit Losses 265 27 292 (60)
Ending balance $ 2,565 $ 547 $ 2,565 $ 547