v3.26.3
BORROWINGS - Narrative (Details) - USD ($)
Jan. 08, 2026
Oct. 10, 2026
Sep. 30, 2026
Dec. 31, 2025
Debt Instrument, Redemption [Line Items]        
Short-term advance     $ 100,000,000 $ 170,000,000
Long-term advances     1,300,000 1,200,000
Federal home loan bank stock outstanding     0 0
Credit agreement, outstanding balance     0 13,000,000
Unsecured Revolving Credit Agreement | Working capital lines of credit loans | Revolving Credit Facility        
Debt Instrument, Redemption [Line Items]        
Credit agreement, outstanding balance     0 13,000,000.0
Unsecured Revolving Credit Agreement | Working capital lines of credit loans | Revolving Credit Facility | Subsequent Event        
Debt Instrument, Redemption [Line Items]        
Credit agreement, maximum borrowing capacity   $ 30,000,000.0    
Long-term debt, term   1 year    
Federal Home Loan Bank of Indianapolis        
Debt Instrument, Redemption [Line Items]        
Advances outstanding     101,300,000 171,200,000
Short-term advance     $ 100,000,000 170,000,000
Interest rate     4.03%  
Long-term advances     $ 1,300,000 1,200,000
Repayments of advance $ 170,000,000.0      
Federal Home Loan Bank of Indianapolis | Housing Supply RBA, 1.00% due August 13, 2032        
Debt Instrument, Redemption [Line Items]        
Long-term advances     100,000 $ 0
Federal Home Loan Bank of Indianapolis | Community Development Financial Institution RBA, 0.00%, due March 12, 2035        
Debt Instrument, Redemption [Line Items]        
Long-term advances     $ 1,200,000