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

Securities - Summary of Investment Securities Available for Sale (Detail)

v3.25.0.1
Securities - Summary of Investment Securities Available for Sale (Detail) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost $ 1,004,563 $ 967,031
Gross Unrealized Gain 901 891
Gross Unrealized Loss (99,666) (102,183)
Estimated Fair Value 905,798 865,739
U.S. Treasury securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 89,208 86,355
Gross Unrealized Gain 242 173
Gross Unrealized Loss (521) (1,040)
Estimated Fair Value 88,929 85,488
Mortgage-backed securities - residential    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 453,993 504,544
Gross Unrealized Gain 222 481
Gross Unrealized Loss (61,643) (62,697)
Estimated Fair Value 392,572 442,328
Mortgage-backed securities - commercial    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 75,947 59,973
Gross Unrealized Gain 24  
Gross Unrealized Loss (13,055) (11,982)
Estimated Fair Value 62,916 47,991
Collateralized mortgage obligations    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 182,553 106,823
Gross Unrealized Gain 404 237
Gross Unrealized Loss (9,401) (9,649)
Estimated Fair Value 173,556 97,411
Debt securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 126,776 132,215
Gross Unrealized Gain 9  
Gross Unrealized Loss (3,969) (7,590)
Estimated Fair Value 122,816 124,625
Total U.S. government agency and sponsored agency obligations    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 839,269 803,555
Gross Unrealized Gain 659 718
Gross Unrealized Loss (88,068) (91,918)
Estimated Fair Value 751,860 712,355
Municipal bonds-tax exempt    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 76,086 77,121
Gross Unrealized Loss (11,077) (9,225)
Estimated Fair Value $ 65,009 $ 67,896