v3.26.3
Loans and Allowance for Credit Losses - Additional Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Jun. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Jun. 30, 2025
Dec. 31, 2024
Financing Receivable, Allowance for Credit Loss [Line Items]                
Proceeds from sales of loans held for sale       $ 6,164 $ 0      
Transfer from loans to loans held for sale       13,896,408 3,684,181      
Loans held for sale $ 140,337     140,337   $ 71,216    
Accrued interest on loans 23,900     23,900   17,900    
Accrued interest on loans, allowance (958)     (958)   (616)    
Pledged loans 3,977,425     3,977,425   3,580,001    
Balance of SBA and USDA loans and participations sold and serviced 2,200     2,200   2,500    
Balance of main street lending program loans and participations serviced 23,100     23,100        
Purchased loans 4,300     4,300        
Unamortized premium 80     80   84    
Purchased participation loans 23,900     23,900   26,900    
90 Days or More Past Due and Still Accruing $ 31,343     $ 31,343   33,144    
Threshold period for past due loans (in days) 90 days     90 days        
Accounts receivable, noncurrent, 90 days or more past due, still accruing           33,100    
Allowance for credit losses $ 208,104 $ 213,724 $ 173,813 $ 208,104 173,813 169,530 $ 164,794 $ 176,994
Loans receivable 4,185,529     4,185,529   3,749,531    
Gross loans receivable 4,192,117     4,192,117   3,756,829    
CCBX                
Financing Receivable, Allowance for Credit Loss [Line Items]                
90 Days or More Past Due and Still Accruing 31,343     31,343   33,144    
Provision (Recapture) For Unfunded Commitments 319   0 342 602      
Gross loans receivable 2,207,534     2,207,534   1,808,094    
Community Bank                
Financing Receivable, Allowance for Credit Loss [Line Items]                
90 Days or More Past Due and Still Accruing 0     0   0    
Gross loans receivable 1,984,583     1,984,583   1,948,735    
Owner-Occupied Real Estate                
Financing Receivable, Allowance for Credit Loss [Line Items]                
Commercial real estate loans 386,700     386,700   374,700    
Non-Owner-Occupied Real Estate                
Financing Receivable, Allowance for Credit Loss [Line Items]                
Commercial real estate loans 546,200     546,200   531,100    
Multi-Family Residential Loans                
Financing Receivable, Allowance for Credit Loss [Line Items]                
Commercial real estate loans 345,100     345,100   367,900    
Farmland Loans                
Financing Receivable, Allowance for Credit Loss [Line Items]                
Commercial real estate loans $ 13,700     $ 13,700   12,200    
CCBX                
Financing Receivable, Allowance for Credit Loss [Line Items]                
Company's responsibility for credit losses (in percent) 5.00%     5.00%        
Loans receivable $ 167,500     $ 167,500        
Amount of loans that company is responsible for credit loss $ 25,100     $ 25,100        
Responsibility of partner, percentage 15.00%     15.00%        
Revenue earned, percentage 100.00%     100.00%        
CCBX | Less Than 90 Days Past Due                
Financing Receivable, Allowance for Credit Loss [Line Items]                
Nonaccrual loans $ 18,700     $ 18,700   20,300    
Minimum                
Financing Receivable, Allowance for Credit Loss [Line Items]                
Sustained repayment performance period of loan placed on nonaccrual       6 months        
Percentage of collateral coverage to loan balance       100.00%        
Loan repayment extended period of time       6 months        
Unfunded Loan Commitment                
Financing Receivable, Allowance for Credit Loss [Line Items]                
Provision (Recapture) For Unfunded Commitments 1,400   (1,700) $ 267 411      
Accounts Receivable                
Financing Receivable, Allowance for Credit Loss [Line Items]                
Provision (Recapture) For Unfunded Commitments 0   0 252 0      
Asset Pledged as Collateral                
Financing Receivable, Allowance for Credit Loss [Line Items]                
Pledged loans 833,500     833,500   895,500    
Commercial and industrial loans                
Financing Receivable, Allowance for Credit Loss [Line Items]                
Capital call lines, provided to venture capital firms 209,700     209,700   210,500    
Balance of main street lending program loans and participations serviced 1,200     1,200        
Allowance for credit losses 7,651 6,882 8,466 7,651 8,466 8,757 8,754 11,051
Loans receivable 241,401     241,401   224,439    
Consumer and other loans:                
Financing Receivable, Allowance for Credit Loss [Line Items]                
Overdrafts included in loans 42,000     42,000   16,900    
Allowance for credit losses 177,154 186,481 135,014 177,154 135,014 137,597 131,251 141,798
Loans receivable 10,736     10,736   14,072    
Gross loans receivable 1,653,863     1,653,863   1,328,461    
Consumer and other loans: | CCBX                
Financing Receivable, Allowance for Credit Loss [Line Items]                
Gross loans receivable 1,091,049     1,091,049   691,708    
Consumer and other loans: | Community Bank                
Financing Receivable, Allowance for Credit Loss [Line Items]                
90 Days or More Past Due and Still Accruing 0     0   0    
Gross loans receivable 10,736     10,736   14,072    
Community Bank                
Financing Receivable, Allowance for Credit Loss [Line Items]                
Overdrafts included in loans 18     18   10    
CCBX                
Financing Receivable, Allowance for Credit Loss [Line Items]                
Proceeds from sales of loans held for sale       13,830,000        
Overdrafts included in loans $ 42,000     $ 42,000   16,800    
Threshold period for past due loans (in days) 180 days     180 days        
Valuation adjustment   (46,000)   $ 45,600        
Consumer Portfolio Segment | Installment/Closed-End Consumer Loans                
Financing Receivable, Allowance for Credit Loss [Line Items]                
Threshold period for past due loans (in days) 120 days     120 days        
Consumer Portfolio Segment | Revolving/Open-End Consumer Loans                
Financing Receivable, Allowance for Credit Loss [Line Items]                
Threshold period for past due loans (in days) 180 days     180 days        
Commercial and industrial loans | Community Bank                
Financing Receivable, Allowance for Credit Loss [Line Items]                
90 Days or More Past Due and Still Accruing $ 0     $ 0   0    
Gross loans receivable 241,401     241,401   224,439    
Construction, land and land development loans                
Financing Receivable, Allowance for Credit Loss [Line Items]                
90 Days or More Past Due and Still Accruing              
Allowance for credit losses 3,796 3,990 6,446 3,796 6,446 6,580 5,265 3,439
Gross loans receivable              
Construction, land and land development loans | Community Bank                
Financing Receivable, Allowance for Credit Loss [Line Items]                
90 Days or More Past Due and Still Accruing 0     0   0    
Gross loans receivable 248,766     248,766   222,075    
Real Estate Portfolio Segment | Commercial real estate loans                
Financing Receivable, Allowance for Credit Loss [Line Items]                
Allowance for credit losses 5,616 $ 5,712 $ 6,283 5,616 $ 6,283 5,496 $ 7,300 $ 8,456
Loans receivable 1,291,700     1,291,700   1,285,856    
Real Estate Portfolio Segment | Commercial real estate loans | Community Bank                
Financing Receivable, Allowance for Credit Loss [Line Items]                
90 Days or More Past Due and Still Accruing 0     0   0    
Gross loans receivable 1,291,700     1,291,700   1,285,856    
CCBX Loans                
Financing Receivable, Allowance for Credit Loss [Line Items]                
Consumer and other loans 1,640,000     1,640,000   1,310,000    
Commercial and industrial loans 1,100     1,100   2,300    
Residential real estate loans 330,900     330,900   264,100    
CCBX Loans | Commercial and industrial loans                
Financing Receivable, Allowance for Credit Loss [Line Items]                
Gross loans receivable 233,500     233,500   229,600    
CCBX Loans | Consumer Loan                
Financing Receivable, Allowance for Credit Loss [Line Items]                
Purchased loans 102,200     102,200   134,900    
Consumer and other loans 101,100     101,100   132,600    
Credit cards                
Financing Receivable, Allowance for Credit Loss [Line Items]                
Proceeds from sales of loans held for sale       11,000,000        
Capital call lines                
Financing Receivable, Allowance for Credit Loss [Line Items]                
Commercial and industrial loans 209,700     209,700   210,500    
Unsecured C C B X Loans                
Financing Receivable, Allowance for Credit Loss [Line Items]                
Commercial and industrial loans $ 23,800     $ 23,800   $ 19,200