v3.26.3
Significant Accounting Policies - Acquisition (Details) - First Illinois
Aug. 26, 2026
$ / shares
shares
Acquisitions  
Number of shares issuable for each First Illinois common stock | shares 0.5727
Amount in cash each share right to receive | $ / shares $ 44.35
First Illinois percentage of shares to be converted common stock 70.00%
First Illinois percentage of shares to be exchanged for cash 30.00%