XML 48 R41.htm IDEA: XBRL DOCUMENT v3.25.1
Investment Securities - Additional Information (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2025
Dec. 31, 2024
Schedule of Available-for-sale Securities and Held-to-Maturity Securities [Line Items]    
Available for sale securities continuous unrealized loss position twelve months or more amortized historical cost basis $ 293.3  
Available-for-sale investment securities aggregate fair value that exceeded and amortized historical cost $ 9.2 $ 10.2
Available-for-sale investment securities aggregate fair value and amortized historical cost percentage (3.10%) (3.70%)
Available-for-sale investment securities decline in fair value and amortized historical cost $ 1.0  
Available For Sale Securities Continuous Unrealized Loss Position Greater Than Twelve Months Amortized Historical Cost Basis   $ 279.6
Securities pledged to collateralize deposit 153.3 119.8
Securities pledged to collateralize borrowing 105.8 123.2
Aggregate fair value 1.0  
Held-to-Maturity Securities [Member]    
Schedule of Available-for-sale Securities and Held-to-Maturity Securities [Line Items]    
Available for sale securities continuous unrealized loss position twelve months or more amortized historical cost basis 156.0 158.9
Available-for-sale investment securities aggregate fair value that exceeded and amortized historical cost $ 6.9 $ 7.9
Available-for-sale investment securities aggregate fair value and amortized historical cost percentage (4.40%) (5.00%)