v3.25.4
LOANS AND ALLOWANCE FOR CREDIT LOSSES - Narrative (Details) - USD ($)
 3 Months Ended 12 Months Ended
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Jul. 10, 2025
Jun. 30, 2025
Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Premiums and discounts on acquired loans $ 9,300,000 $ 9,300,000 $ 2,689,000        
Net deferred origination and factoring fees 2,530,000 2,530,000 3,128,000        
Accrued interest on loans $ 42,478,000 42,478,000 $ 36,838,000        
Purchased credit deteriorated loan   23,411,000          
Purchase price of credit deteriorated loan   3,284,000          
ACL on PCD loan   10,780,000          
Discount on PCD loan   $ 9,348,000          
Percentage of factored receivables 97.00% 97.00% 97.00%        
Percentage of factored receivables to total loan portfolio 29.00% 29.00% 26.00%        
Loans, net $ 4,954,796,000 $ 4,954,796,000 $ 4,506,246,000        
Pledged loans 1,725,914,000 1,725,914,000 1,744,145,000        
Credit loss expense   $ 3,148,000 18,767,000 $ 12,203,000      
Discounted cash flow method, reasonable and supportable forecast period   1 year          
Allowance for credit losses on loans, reasonable and supportable forecasts not available, historical loss information used, period   2 years          
Misdirected payments 4,991,307,000 $ 4,991,307,000 4,546,960,000        
ACL allocation 36,511,000 36,511,000 40,714,000        
Interest earned on nonaccrual loans   0 0 0      
Commitments to lend 302,000 302,000          
Loans to borrowers experiencing financial difficulty that had payment default   566,000 1,771,000 0      
Financial Asset Acquired with Credit Deterioration              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Benefit to credit loss expense 9,460,000            
Net charge-off 1,320,000            
Past Due 90 Days or More              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Misdirected payments 22,986,000 22,986,000 86,897,000        
Loans Held for Investment              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
ACL on PCD loan   10,780,000          
Net charge-offs   18,213,000 13,108,000        
Credit loss expense   3,230,000 18,603,000 12,226,000      
ACL allocation 36,511,000 36,511,000 40,714,000 35,219,000     $ 42,807,000
Changes In Allowance For Credit Losses              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Increase in allowance for credit losses due to changes in projected loss drivers and prepayment assumptions   706,000          
Increase in allowance for credit losses due to changes in loan volume and mix   3,569,000          
Decrease in allowance for credit losses due to decrease in specific reserves   8,477,000          
Factored receivables              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Customer reserves associated with factored receivables 338,496,000 338,496,000 267,891,000        
Misdirected payments 1,462,900,000 1,462,900,000 1,204,510,000        
Factored receivables | Past Due 90 Days or More              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Misdirected payments 1,347,000 1,347,000 24,718,000        
Factored receivables | United States Postal Service              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Loans, net 0 0 19,361,000   $ 19,400,000 $ 19,400,000  
Factored receivables | Over-Formula Advances              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Misdirected payments     1,429,000        
Factored receivables | Misdirected Payments Receivable | United States Postal Service              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Misdirected payments     19,361,000        
ACL allocation     0        
Factored receivables | Loans Held for Investment              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Credit loss expense   2,611,000 3,812,000 2,961,000      
ACL allocation 10,069,000 10,069,000 9,600,000 11,896,000     19,121,000
1-4 family residential              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Misdirected payments 193,508,000 193,508,000 154,020,000        
1-4 family residential | Past Due 90 Days or More              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Misdirected payments 1,489,000 1,489,000 229,000        
1-4 family residential | Loans Held for Investment              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Credit loss expense   584,000 544,000 82,000      
ACL allocation 1,927,000 1,927,000 1,404,000 $ 927,000     $ 838,000
1-4 family residential | Real Eatate Loans              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Residential real estate loans in process of foreclosure $ 371,000 $ 371,000 $ 0        
Texas | Accounts Receivable | Geographic Concentration Risk              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Percentage of customers located within states   20.00% 22.00%        
Illinois | Accounts Receivable | Geographic Concentration Risk              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Percentage of customers located within states   10.00% 12.00%        
Colorado | Accounts Receivable | Geographic Concentration Risk              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Percentage of customers located within states   10.00% 10.00%        
Iowa | Accounts Receivable | Geographic Concentration Risk              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Percentage of customers located within states   4.00% 4.00%        
Texas, Colorado, Illinois, And Iowa | Accounts Receivable | Geographic Concentration Risk              
Accounts, Notes, Loans and Financing Receivable [Line Items]              
Percentage of customers located within states   44.00% 48.00%