v3.25.2
Business Combination and Asset Purchase - Summary of Changes in Accretable Yield or Income Expected to be Collected (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Peoples Federal Savings and Loan [Member]        
Business Acquisition [Line Items]        
Beginning Balance $ 277 $ 508 $ 335 $ 566
Additions 0 0 0 0
Accretion (58) (58) (116) (116)
Reclassification from nonaccretable difference 0 0 0 0
Disposals 0 0 0 0
Ending Balance 219 450 219 450
Perpetual Federal Savings Bank [Member]        
Business Acquisition [Line Items]        
Beginning Balance 1,117 2,460 1,453 2,795
Additions 0 0 0 0
Accretion (335) (336) (671) (671)
Reclassification from nonaccretable difference 0 0 0 0
Disposals 0 0 0 0
Ending Balance 782 2,124 782 2,124
Ossian Financial Services, Inc. [Member]        
Business Acquisition [Line Items]        
Beginning Balance 67 250 107 294
Additions 0 0 0 0
Accretion (39) (44) (79) (88)
Reclassification from nonaccretable difference 0 0 0 0
Disposals (1) 0 (1) 0
Ending Balance 27 206 27 206
Limberlost Bancshares, Inc. [Member]        
Business Acquisition [Line Items]        
Beginning Balance 0 254 0 363
Additions 0 0 0 0
Accretion 0 (109) 0 (218)
Reclassification from nonaccretable difference 0 1 0 1
Disposals 0 0 0 0
Ending Balance $ 0 $ 146 $ 0 $ 146