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Fair Value of Financial Instruments - Narrative (Details) - USD ($)
 6 Months Ended 12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Servicing asset at fair value, gain on disposal   $ 410,000    
Mortgage servicing rights assets recognized or recorded during period $ 0      
Carrying value MSR assets 0 $ 0 $ 0 $ 15,637,000
Equity investments 31,700,000   28,200,000  
Other financial institutions, excluding FRBD and FHLB 43,400,000   43,400,000  
Impairment recorded on investments in equity securities that do not have readily determinable fair values 0      
Loan balance individually evaluated 14,510,000   17,724,000  
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Nonrecurring        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Loan balance individually evaluated 4,700,000   4,500,000  
Foreclosed assets 2,000,000.0   3,600,000  
Fair Value, Inputs, Level 3 | Fair Value, Measurements, Nonrecurring | Residential real estate | Residential real estate        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Residential mortgage loans in the process of foreclosure $ 2,700,000   $ 5,100,000  
Maximum | Measurement Input, Credit Spread        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Credit spread, securities at fair value through income 2.27%   2.27%