v3.26.1
Investments - Summary of Gross Unrealized or Unrecognized Losses and Fair Value of Securities (Detail) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Schedule of Investments [Line Items]    
Total, Available-for-sale securities, Less Than 12 Months, Fair Value $ 477,779 $ 167,869
Total, Available-for-sale securities, Less Than 12 Months, Unrealized Loss (3,926) (753)
Total, Available-for-sale securities, 12 Months or More, Fair Value 70,232 74,729
Total, Available-for-sale securities, 12 Months or More, Unrealized Loss (2,412) (2,135)
Total, Available-for-sale securities, Fair Value 548,011 242,598
Total, Available-for-sale securities, Unrealized Loss (6,338) (2,888)
U.S. Government Sponsored Entities [Member]    
Schedule of Investments [Line Items]    
Total, Available-for-sale securities, Less Than 12 Months, Fair Value 0 0
Total, Available-for-sale securities, Less Than 12 Months, Unrealized Loss 0 0
Total, Available-for-sale securities, 12 Months or More, Fair Value 0 0
Total, Available-for-sale securities, 12 Months or More, Unrealized Loss 0 0
Total, Available-for-sale securities, Fair Value 0 0
Total, Available-for-sale securities, Unrealized Loss 0 0
U.S. Treasury securities [Member]    
Schedule of Investments [Line Items]    
Total, Available-for-sale securities, Less Than 12 Months, Fair Value 0 0
Total, Available-for-sale securities, Less Than 12 Months, Unrealized Loss 0 0
Total, Available-for-sale securities, 12 Months or More, Fair Value 0 0
Total, Available-for-sale securities, 12 Months or More, Unrealized Loss 0 0
Total, Available-for-sale securities, Fair Value 0 0
Total, Available-for-sale securities, Unrealized Loss 0 0
Government-Sponsored Residential Mortgage-Backed Securities [Member]    
Schedule of Investments [Line Items]    
Total, Available-for-sale securities, Less Than 12 Months, Fair Value 400,818 129,917
Total, Available-for-sale securities, Less Than 12 Months, Unrealized Loss (3,399) (519)
Total, Available-for-sale securities, 12 Months or More, Fair Value 27,554 28,089
Total, Available-for-sale securities, 12 Months or More, Unrealized Loss (851) (761)
Total, Available-for-sale securities, Fair Value 428,372 158,006
Total, Available-for-sale securities, Unrealized Loss (4,250) (1,280)
Private Label Residential Mortgage-Backed Securities [Member]    
Schedule of Investments [Line Items]    
Total, Available-for-sale securities, 12 Months or More, Fair Value 4,203 4,326
Total, Available-for-sale securities, 12 Months or More, Unrealized Loss (95) (115)
Total, Available-for-sale securities, Fair Value 4,203 4,326
Total, Available-for-sale securities, Unrealized Loss (95) (115)
Corporate [Member]    
Schedule of Investments [Line Items]    
Total, Available-for-sale securities, Less Than 12 Months, Fair Value 20,064 11,837
Total, Available-for-sale securities, Less Than 12 Months, Unrealized Loss (128) (73)
Total, Available-for-sale securities, 12 Months or More, Fair Value 24,037 24,225
Total, Available-for-sale securities, 12 Months or More, Unrealized Loss (1,197) (1,005)
Total, Available-for-sale securities, Fair Value 44,101 36,062
Total, Available-for-sale securities, Unrealized Loss (1,325) (1,078)
Small Business Administration Loan Pools [Member]    
Schedule of Investments [Line Items]    
Total, Available-for-sale securities, Less Than 12 Months, Fair Value 46,696 23,308
Total, Available-for-sale securities, Less Than 12 Months, Unrealized Loss (133) (52)
Total, Available-for-sale securities, 12 Months or More, Fair Value 7,443 8,629
Total, Available-for-sale securities, 12 Months or More, Unrealized Loss (58) (72)
Total, Available-for-sale securities, Fair Value 54,139 31,937
Total, Available-for-sale securities, Unrealized Loss (191) (124)
State and Political Subdivisions [Member]    
Schedule of Investments [Line Items]    
Total, Available-for-sale securities, Less Than 12 Months, Fair Value 10,201 2,807
Total, Available-for-sale securities, Less Than 12 Months, Unrealized Loss (266) (109)
Total, Available-for-sale securities, 12 Months or More, Fair Value 6,995 9,460
Total, Available-for-sale securities, 12 Months or More, Unrealized Loss (211) (182)
Total, Available-for-sale securities, Fair Value 17,196 12,267
Total, Available-for-sale securities, Unrealized Loss $ (477) $ (291)