v3.25.4
Investments - Summary of Gross Unrealized Losses and Fair Value of Securities (Detail) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Schedule of Investments [Line Items]    
Total, Available-for-sale securities, Less Than 12 Months, Fair Value $ 167,869 $ 200,503
Total, Available-for-sale securities, Less Than 12 Months, Unrealized Loss (753) (1,789)
Total, Available-for-sale securities, 12 Months or More, Fair Value 74,729 556,591
Total, Available-for-sale securities, 12 Months or More, Unrealized Loss (2,135) (74,344)
Total, Available-for-sale securities, Fair Value 242,598 757,094
Total, Available-for-sale securities, Unrealized Loss (2,888) (76,133)
Total, Held-to-maturity securities, Less Than 12 Months, Fair Value   1,020
Total, Held-to-maturity securities, Less Than 12 Months, Unrealized Loss   (32)
Total, Held-to-maturity securities, Fair Value   1,020
Total, Held-to-maturity securities, Unrealized Loss   (32)
U.S. Government Sponsored Entities [Member]    
Schedule of Investments [Line Items]    
Total, Available-for-sale securities, Less Than 12 Months, Fair Value 0 15,084
Total, Available-for-sale securities, Less Than 12 Months, Unrealized Loss 0 (62)
Total, Available-for-sale securities, 12 Months or More, Fair Value 0 32,195
Total, Available-for-sale securities, 12 Months or More, Unrealized Loss 0 (6,085)
Total, Available-for-sale securities, Fair Value 0 47,279
Total, Available-for-sale securities, Unrealized Loss 0 (6,147)
U.S. Treasury securities [Member]    
Schedule of Investments [Line Items]    
Total, Available-for-sale securities, Less Than 12 Months, Fair Value 0 2,940
Total, Available-for-sale securities, Less Than 12 Months, Unrealized Loss 0 (1)
Total, Available-for-sale securities, 12 Months or More, Fair Value 0 19,943
Total, Available-for-sale securities, 12 Months or More, Unrealized Loss 0 (77)
Total, Available-for-sale securities, Fair Value 0 22,883
Total, Available-for-sale securities, Unrealized Loss 0 (78)
Government-Sponsored Residential Mortgage-Backed Securities [Member]    
Schedule of Investments [Line Items]    
Total, Available-for-sale securities, Less Than 12 Months, Fair Value 129,917 148,954
Total, Available-for-sale securities, Less Than 12 Months, Unrealized Loss (519) (1,533)
Total, Available-for-sale securities, 12 Months or More, Fair Value 28,089 268,364
Total, Available-for-sale securities, 12 Months or More, Unrealized Loss (761) (34,402)
Total, Available-for-sale securities, Fair Value 158,006 417,318
Total, Available-for-sale securities, Unrealized Loss (1,280) (35,935)
Total, Held-to-maturity securities, Less Than 12 Months, Fair Value   853
Total, Held-to-maturity securities, Less Than 12 Months, Unrealized Loss   (26)
Total, Held-to-maturity securities, Fair Value   853
Total, Held-to-maturity securities, Unrealized Loss   (26)
Private Label Residential Mortgage-Backed Securities [Member]    
Schedule of Investments [Line Items]    
Total, Available-for-sale securities, 12 Months or More, Fair Value 4,326 124,664
Total, Available-for-sale securities, 12 Months or More, Unrealized Loss (115) (20,307)
Total, Available-for-sale securities, Fair Value 4,326 124,664
Total, Available-for-sale securities, Unrealized Loss (115) (20,307)
Corporate [Member]    
Schedule of Investments [Line Items]    
Total, Available-for-sale securities, Less Than 12 Months, Fair Value 11,837 1,765
Total, Available-for-sale securities, Less Than 12 Months, Unrealized Loss (73) (34)
Total, Available-for-sale securities, 12 Months or More, Fair Value 24,225 47,022
Total, Available-for-sale securities, 12 Months or More, Unrealized Loss (1,005) (3,438)
Total, Available-for-sale securities, Fair Value 36,062 48,787
Total, Available-for-sale securities, Unrealized Loss (1,078) (3,472)
Small Business Administration Loan Pools [Member]    
Schedule of Investments [Line Items]    
Total, Available-for-sale securities, Less Than 12 Months, Fair Value 23,308 23,812
Total, Available-for-sale securities, Less Than 12 Months, Unrealized Loss (52) (70)
Total, Available-for-sale securities, 12 Months or More, Fair Value 8,629 2,284
Total, Available-for-sale securities, 12 Months or More, Unrealized Loss (72) (273)
Total, Available-for-sale securities, Fair Value 31,937 26,096
Total, Available-for-sale securities, Unrealized Loss (124) (343)
State and Political Subdivisions [Member]    
Schedule of Investments [Line Items]    
Total, Available-for-sale securities, Less Than 12 Months, Fair Value 2,807 7,948
Total, Available-for-sale securities, Less Than 12 Months, Unrealized Loss (109) (89)
Total, Available-for-sale securities, 12 Months or More, Fair Value 9,460 62,119
Total, Available-for-sale securities, 12 Months or More, Unrealized Loss (182) (9,762)
Total, Available-for-sale securities, Fair Value 12,267 70,067
Total, Available-for-sale securities, Unrealized Loss $ (291) (9,851)
Total, Held-to-maturity securities, Less Than 12 Months, Fair Value   167
Total, Held-to-maturity securities, Less Than 12 Months, Unrealized Loss   (6)
Total, Held-to-maturity securities, Fair Value   167
Total, Held-to-maturity securities, Unrealized Loss   $ (6)