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

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

v3.25.4
Securities - Summary of Investment Securities Available for Sale (Detail) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost $ 941,760 $ 1,004,563
Gross Unrealized Gain 3,108 901
Gross Unrealized Loss (64,244) (99,666)
Estimated Fair Value 880,624 905,798
U.S. Treasury securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 128,569 89,208
Gross Unrealized Gain 298 242
Gross Unrealized Loss (157) (521)
Estimated Fair Value 128,710 88,929
Mortgage-backed securities - residential    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 411,223 453,993
Gross Unrealized Gain 926 222
Gross Unrealized Loss (38,741) (61,643)
Estimated Fair Value 373,408 392,572
Mortgage-backed securities - commercial    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 71,751 75,947
Gross Unrealized Gain 116 24
Gross Unrealized Loss (11,295) (13,055)
Estimated Fair Value 60,572 62,916
Collateralized mortgage obligations    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 188,120 182,553
Gross Unrealized Gain 1,768 404
Gross Unrealized Loss (5,933) (9,401)
Estimated Fair Value 183,955 173,556
Debt securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 67,059 126,776
Gross Unrealized Gain   9
Gross Unrealized Loss (1,105) (3,969)
Estimated Fair Value 65,954 122,816
Total U.S. government agency and sponsored agency obligations    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 738,153 839,269
Gross Unrealized Gain 2,810 659
Gross Unrealized Loss (57,074) (88,068)
Estimated Fair Value 683,889 751,860
Municipal bonds-tax exempt    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 75,038 76,086
Gross Unrealized Loss (7,013) (11,077)
Estimated Fair Value $ 68,025 $ 65,009