v3.26.1
Loans and Allowance for Credit Losses - Additional Information (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Dec. 31, 2024
Financing Receivable, Allowance for Credit Loss [Line Items]        
Transfer from loans to loans held for sale $ 3,331,789 $ 766,149    
Loans held for sale 124,039   $ 71,216  
Accrued interest on loans 18,300   17,900  
Accrued interest on loans, allowance (627)   (616)  
Pledged loans 3,686,952   3,580,001  
Balance of SBA and USDA loans and participations sold and serviced 2,300   2,500  
Balance of main street lending program loans and participations serviced 23,100      
Purchased loans 4,400      
Unamortized premium 83   84  
Purchased participation loans 28,500   26,900  
90 Days or More Past Due and Still Accruing $ 35,199   33,144  
Threshold period for past due loans (in days) 90 days      
Accounts receivable, noncurrent, 90 days or more past due, still accruing     33,100  
Allowance for credit losses $ 172,427 183,178 169,530 $ 176,994
Loans receivable 3,859,379   3,749,531  
Gross loans receivable 3,866,474   3,756,829  
CCBX        
Financing Receivable, Allowance for Credit Loss [Line Items]        
90 Days or More Past Due and Still Accruing 35,199   33,144  
Provision (Recapture) For Unfunded Commitments 11 784    
Gross loans receivable 1,884,641   1,808,094  
Community Bank        
Financing Receivable, Allowance for Credit Loss [Line Items]        
90 Days or More Past Due and Still Accruing 0   0  
Gross loans receivable 1,981,833   1,948,735  
Owner-Occupied Real Estate        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Commercial real estate loans 375,500   374,700  
Non-Owner-Occupied Real Estate        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Commercial real estate loans 552,000   531,100  
Multi-Family Residential Loans        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Commercial real estate loans 359,100   367,900  
Farmland Loans        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Commercial real estate loans 14,000   12,200  
CCBX        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Accounts receivable, noncurrent, 90 days or more past due, amount covered by credit enhancements $ 34,200   30,900  
Company's responsibility for credit losses (in percent) 5.00%      
Loans receivable $ 324,000      
Amount of loans that company is responsible for credit loss $ 22,000      
Responsibility of partner, percentage 95.00%      
Revenue earned, percentage 100.00%      
Fraud losses, responsibility of partner, percentage 100.00%      
CCBX | Less Than 90 Days Past Due        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Nonaccrual loans $ 22,300   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 $ (1,300) 613    
Accounts Receivable        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Provision (Recapture) For Unfunded Commitments 252 0    
Asset Pledged as Collateral        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Pledged loans 891,400   895,500  
Commercial and industrial loans        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Capital call lines, provided to venture capital firms 176,400   210,500  
Balance of main street lending program loans and participations serviced 1,200      
Allowance for credit losses 7,728 10,066 8,757 11,051
Loans receivable 235,603   224,439  
Consumer and other loans:        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Overdrafts included in loans 27,500   16,900  
Allowance for credit losses 144,090 147,028 137,597 141,798
Loans receivable 11,587   14,072  
Gross loans receivable 1,432,015   1,328,461  
Consumer and other loans: | CCBX        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Gross loans receivable 726,943   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  
Gross loans receivable 11,587   14,072  
Community Bank        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Overdrafts included in loans 9   10  
CCBX        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Overdrafts included in loans $ 27,400   16,800  
Threshold period for past due loans (in days) 180 days      
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      
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      
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  
Gross loans receivable 235,603   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 6,101 4,531 6,580 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  
Gross loans receivable 234,911   222,075  
Real Estate Portfolio Segment | Commercial real estate loans        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Allowance for credit losses 6,010 $ 8,110 5,496 $ 8,456
Loans receivable 1,300,547   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  
Gross loans receivable 1,300,547   1,285,856  
CCBX Loans        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Transfer from loans to loans held for sale 3,330,000      
Proceeds from sales of loans held for sale 3,280,000      
Consumer and other loans 1,420,000   1,310,000  
Commercial and industrial loans 1,800   2,300  
Residential real estate loans 266,000   264,100  
CCBX Loans | Commercial and industrial loans        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Gross loans receivable 198,200   229,600  
CCBX Loans | Consumer Loan        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Purchased loans 129,400   134,900  
Consumer and other loans 127,600   132,600  
Credit cards        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Proceeds from sales of loans held for sale 2,630,000      
Capital call lines        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Commercial and industrial loans 176,400   210,500  
Unsecured C C B X Loans        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Commercial and industrial loans $ 21,800   $ 19,200