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Debt - Narrative (Details) - USD ($)
3 Months Ended 6 Months Ended
Jan. 13, 2022
Aug. 31, 2020
Aug. 31, 2020
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Debt Conversion [Line Items]            
Loans pledged to the FHLB       $ 2,627,730,000   $ 2,733,150,000
Total borrowing capacity with the FHLB       1,437,033,000   $ 1,669,888,000
Additional borrowing availability with the FHLB       1,333,895,000    
Amortization of issuance costs on subordinated debt       73,000 $ 73,000  
Trust preferred securities, aggregate liquidation valuation amount       419,000    
Trust Preferred Securities | New Mexico Banquest Capital Trust I (NMBCT I)            
Debt Conversion [Line Items]            
Debt instrument, face amount       9,279,000    
Trust Preferred Securities | New Mexico Banquest Capital Trust II (NMBCT II)            
Debt Conversion [Line Items]            
Debt instrument, face amount       4,640,000    
Subordinated Notes Due July 1, 2030 | Subordinated Debt            
Debt Conversion [Line Items]            
Debt instrument, face amount   $ 40,000,000 $ 40,000,000      
Debt instrument, interest rate   6.00% 6.00%      
Debt redemption period from issuance date     5 years      
Costs related to the issuance of the subordinated notes   $ 933,000 $ 933,000      
Amortization of issuance costs on subordinated debt   $ 0        
Subordinated Notes Due January 15, 2032 | Subordinated Debt            
Debt Conversion [Line Items]            
Debt instrument, face amount $ 25,000,000          
Debt instrument, interest rate 3.375%          
Debt redemption period from issuance date 5 years          
Costs related to the issuance of the subordinated notes $ 534,000          
Amortization of issuance costs on subordinated debt $ 0          
Subordinated Debt related to Trust Preferred Securities | Subordinated Debt            
Debt Conversion [Line Items]            
Debt instrument, face amount       13,919,000    
Debt discount on the convertible notes       $ 4,293,000    
SOFR | Subordinated Notes Due July 1, 2030 | Subordinated Debt            
Debt Conversion [Line Items]            
Interest rate margin on variable rate basis     5.89%      
SOFR | Subordinated Notes Due January 15, 2032 | Subordinated Debt            
Debt Conversion [Line Items]            
Interest rate margin on variable rate basis 2.03%          
LIBOR | Trust Preferred Securities | New Mexico Banquest Capital Trust I (NMBCT I)            
Debt Conversion [Line Items]            
Interest rate margin on variable rate basis       3.35%    
Rate       7.91% 8.91%  
LIBOR | Trust Preferred Securities | New Mexico Banquest Capital Trust II (NMBCT II)            
Debt Conversion [Line Items]            
Interest rate margin on variable rate basis       2.00%    
Rate       6.59% 7.59%  
Line of Credit | Other Financial Institutions            
Debt Conversion [Line Items]            
Line of credit facility, maximum borrowing capacity       $ 160,000,000    
Line of credit outstanding       0    
Line of Credit | Federal Reserve Bank stock            
Debt Conversion [Line Items]            
Line of credit facility, maximum borrowing capacity       2,120,854,000    
Debt collateral amount       2,537,559,000    
Line of credit outstanding       $ 0    
Line of Credit | Federal Reserve Bank stock | Fed Funds target rate            
Debt Conversion [Line Items]            
Interest rate margin on variable rate basis       0.50%