Annual report pursuant to Section 13 and 15(d)

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

v3.24.0.1
Securities - Summary of Investment Securities Available for Sale (Detail) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost $ 967,031 $ 978,796
Gross Unrealized Gain 891 63
Gross Unrealized Loss (102,183) (125,021)
Estimated Fair Value 865,739 853,838
U.S. Treasury securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 86,355 49,690
Gross Unrealized Gain 173  
Gross Unrealized Loss (1,040) (1,664)
Estimated Fair Value 85,488 48,026
Mortgage-backed securities - residential    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 504,544 540,590
Gross Unrealized Gain 481 63
Gross Unrealized Loss (62,697) (75,501)
Estimated Fair Value 442,328 465,152
Mortgage-backed securities - commercial    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 59,973 61,799
Gross Unrealized Loss (11,982) (10,507)
Estimated Fair Value 47,991 51,292
Collateralized mortgage obligations    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 106,823 98,236
Gross Unrealized Gain 237  
Gross Unrealized Loss (9,649) (12,751)
Estimated Fair Value 97,411 85,485
Debt securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 132,215 150,338
Gross Unrealized Loss (7,590) (11,839)
Estimated Fair Value 124,625 138,499
Total U.S. government agency and sponsored agency obligations    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 803,555 850,963
Gross Unrealized Gain 718 63
Gross Unrealized Loss (91,918) (110,598)
Estimated Fair Value 712,355 740,428
Municipal bonds-tax exempt    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 77,121 78,143
Gross Unrealized Gain  
Gross Unrealized Loss (9,225) (12,759)
Estimated Fair Value $ 67,896 $ 65,384