v3.25.4
Basis of Presentation, Description of Business and Summary of Significant Accounting Policies - Narrative (Details)
12 Months Ended
Oct. 27, 2025
USD ($)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Business Combination [Line Items]        
Contractually Specified Servicing Fee Income, Statement of Income or Comprehensive Income [Extensible Enumeration]   Mortgage banking services, net Mortgage banking services, net  
Allowance for credit loss on outstanding servicer advances   $ 0 $ 0  
Goodwill impairment loss   0 0 $ 0
Impairment of long-lived assets   $ 0 0 0
Defined contribution plan, maximum annual contributions per employee, percent   100.00%    
Defined contribution plan, employer matching contribution, percent of employees' elective deferrals   100.00%    
Defined contribution plan, employer matching contribution, percent of match   6.00%    
Employer discretionary contribution amount   $ 6,500,000 $ 6,000,000.0 $ 5,300,000
Core Deposits Intangibles        
Business Combination [Line Items]        
Finite-lived intangible asset, useful life   10 years    
Minimum        
Business Combination [Line Items]        
Mortgage Servicing Rights, base servicing fee as percentage of remaining outstanding principle balances of loans   0.25%    
Promises and equipment, useful lives   1 year    
Minimum | Customer Relationships        
Business Combination [Line Items]        
Finite-lived intangible asset, useful life   10 years    
Maximum        
Business Combination [Line Items]        
Mortgage Servicing Rights, base servicing fee as percentage of remaining outstanding principle balances of loans   0.50%    
Promises and equipment, useful lives   39 years    
Maximum | Customer Relationships        
Business Combination [Line Items]        
Finite-lived intangible asset, useful life   16 years    
First Foundation Inc        
Business Combination [Line Items]        
Business combination, consideration transferred, equity exchange ratio 0.16083      
Payments to acquire businesses $ 17,500,000