XML 47 R40.htm IDEA: XBRL DOCUMENT v3.24.3
Investment Securities - Summary of Amortized Cost and Fair Value of Debt Securities by Contractual Maturity (Detail) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Sep. 30, 2023
Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract]        
Due in one year or less, Amortized Cost, Held-to-maturity $ 10,211      
Due after one year through five years, Amortized Cost, Held-to-maturity 48,525      
Due after five years through ten years, Amortized Cost, Held-to-maturity 322,507      
Due after ten years, Amortized Cost, Held-to-maturity 2,024,011      
Total Held-to-maturity, Debt Maturities, Amortized Cost Basis 2,405,254      
Due in one year or less, Fair Value, Held-to-maturity 10,049      
Due after one year through five years, Fair Value, Held-to-maturity 47,616      
Due after five years through ten years, Fair Value, Held-to-maturity 291,783      
Due after ten years, Fair Value, Held-to-maturity 1,714,246      
Total, Held-to-maturity, Fair Value 2,063,694      
Due in one year or less, Amortized Cost, Available-for-sale 43,249      
Due after one year through five years, Amortized Cost, Available-for-sale 110,874      
Due after five years through ten years, Amortized Cost, Available-for-sale 2,180,665      
Due after ten years, Amortized Cost, Available-for-sale 483,525      
Amortized Cost, Available-for-sale 2,818,313 $ 3,398,942 $ 2,818,313 $ 3,398,942
Due in one year or less, Fair Value, Available-for-sale 43,327      
Due after one year through five years, Fair Value, Available-for-sale 116,476      
Due after five years through ten years, Fair Value, Available-for-sale 1,928,902      
Due after ten years, Fair Value, Available-for-sale 376,880      
Total Available-for-sale Securities, Debt Maturities, Available-for-sale, Fair Value $ 2,465,585 $ 2,956,125