v3.26.1
Related Party Transactions - Narrative (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2026
USD ($)
boardSeat
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
boardSeat
Jun. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Related Party Transaction [Line Items]          
Deposits from related parties $ 306,747   $ 306,747   $ 406,258
Other income $ 2,728 $ 2,540 $ 5,468 $ 3,888  
Number of board seats, privately held entity | boardSeat 2   2    
Amortized cost $ 1,572,921   $ 1,572,921   1,507,466
Manufactured loan housing securities          
Related Party Transaction [Line Items]          
Mater loan purchase agreement, maximum capacity 250,000   $ 250,000    
Master loan purchase agreement, term     5 years    
Loans purchased 10,935 18,516 $ 19,846 28,010  
Amortized cost 156,272   156,272   142,532
Directors          
Related Party Transaction [Line Items]          
Operating lease expense 101 98 203 200  
Directors | FBK Aviation, LLC | Aviation Time Sharing Agreements          
Related Party Transaction [Line Items]          
Other income 48 $ 6 70 $ 25  
Unfunded Loan Commitment | Certain Executive Officers, Certain Management and Directors and Affiliates          
Related Party Transaction [Line Items]          
Unfunded commitments $ 41,191   $ 41,191   $ 47,182