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Goodwill and Intangible Assets - Narrative (Details)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2025
USD ($)
Mar. 31, 2024
USD ($)
item
Dec. 31, 2024
USD ($)
Goodwill and Intangible Assets      
Goodwill acquired $ 306,043   $ 306,043
Goodwill Impairment $ 0   0
Amortization period for acquired intangible assets 9 years 9 months 18 days    
Amortization of acquired identifiable intangibles $ 1,977 $ 2,008  
Mortgage loans serviced 300,000 900,000  
Mortgage service fees 900 400  
Loans $ 7,556,104   7,656,688
Core deposit intangible      
Goodwill and Intangible Assets      
Amortization period 10 years    
Other intangible assets      
Goodwill and Intangible Assets      
Amortization of acquired identifiable intangibles $ 2,000 2,000  
MSRs      
Goodwill and Intangible Assets      
Amortization of acquired identifiable intangibles $ 132 $ 114  
MSRs | Discount rate | Minimum      
Goodwill and Intangible Assets      
Servicing assets measurement input (as a percent) 0.10 0.10  
MSRs | Discount rate | Maximum      
Goodwill and Intangible Assets      
Servicing assets measurement input (as a percent) 0.105 0.105  
MSRs | Constant prepayment speed | Minimum      
Goodwill and Intangible Assets      
Servicing assets measurement input (as a percent) 0.063 0.062  
MSRs | Constant prepayment speed | Maximum      
Goodwill and Intangible Assets      
Servicing assets measurement input (as a percent) 0.124 0.133  
Small Business Administration ("SBA") servicing rights      
Goodwill and Intangible Assets      
Amortization of acquired identifiable intangibles $ 149 $ 74  
Loans 125,000   $ 132,000
Fee income $ 200 $ 100  
Small Business Administration ("SBA") servicing rights | Discount rate      
Goodwill and Intangible Assets      
Servicing assets measurement input (as a percent) 0.093 0.102  
Small Business Administration ("SBA") servicing rights | Constant prepayment speed      
Goodwill and Intangible Assets      
Servicing assets measurement input (as a percent) 0.157 0.158  
Customer relationship intangible      
Goodwill and Intangible Assets      
Amortization period 10 years    
Acquired technology intangible      
Goodwill and Intangible Assets      
Amortization period 5 years