Annual report [Section 13 and 15(d), not S-K Item 405]

Income Taxes - Narrative (Details)

v3.26.1
Income Taxes - Narrative (Details) - USD ($)
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2022
Dec. 31, 2019
Dec. 31, 2018
Tax Credit Carryforward [Line Items]          
Deferred tax liabilities, retained earnings $ 14,500,000 $ 14,500,000      
Unrecorded deferred income tax liability 3,800,000 3,800,000      
Accruals through income tax 0 0      
State and Local Jurisdiction | Indiana Department of Revenue          
Tax Credit Carryforward [Line Items]          
Operating loss carryforwards 5,600,000        
Tax credit carryforward, amount 72,000        
Tax credit carryforward, valuation allowance 72,000 $ 63,000      
Limitation on use of operating losses 5,600,000        
State and Local Jurisdiction | Illinois Department of Revenue          
Tax Credit Carryforward [Line Items]          
Operating loss carryforwards 67,100,000        
State and Local Jurisdiction | Illinois Department of Revenue | First Personal Financial Corporation          
Tax Credit Carryforward [Line Items]          
Operating loss carryforwards         $ 7,200,000
State and Local Jurisdiction | Illinois Department of Revenue | AJS Bancorp, Inc          
Tax Credit Carryforward [Line Items]          
Operating loss carryforwards       $ 11,400,000  
State and Local Jurisdiction | Illinois Department of Revenue | Royal Financial, Inc.          
Tax Credit Carryforward [Line Items]          
Operating loss carryforwards     $ 57,400,000    
Domestic Tax Jurisdiction | Internal Revenue Service (IRS) | First Personal Financial Corporation          
Tax Credit Carryforward [Line Items]          
Operating loss carryforwards         3,300,000
Operating loss carry forwards expires         2,200,000
Operating loss carryforward not subject to expiration         1,100,000
Limitation on use of operating losses         $ 362,000
Domestic Tax Jurisdiction | Internal Revenue Service (IRS) | AJS Bancorp, Inc          
Tax Credit Carryforward [Line Items]          
Operating loss carryforwards       7,200,000  
Operating loss carry forwards expires       3,600,000  
Operating loss carryforward not subject to expiration       3,600,000  
Limitation on use of operating losses       $ 834,000  
Domestic Tax Jurisdiction | Internal Revenue Service (IRS) | Royal Financial, Inc.          
Tax Credit Carryforward [Line Items]          
Operating loss carry forwards expires     2,700,000    
Operating loss carryforward not subject to expiration     623,000    
Limitation on use of operating losses     755,000    
Domestic Tax Jurisdiction | Illinois Department of Revenue          
Tax Credit Carryforward [Line Items]          
Operating loss carryforwards $ 2,400,000        
Domestic Tax Jurisdiction | Illinois Department of Revenue | Royal Financial, Inc.          
Tax Credit Carryforward [Line Items]          
Operating loss carryforwards     $ 3,300,000