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Securities & Allowance for Securities Credit Losses - Schedule of Amortized Cost and Fair Value (Details) - USD ($)
Sep. 30, 2025
Jun. 30, 2025
Dec. 31, 2024
Sep. 30, 2024
Jun. 30, 2024
Dec. 31, 2023
Securities available for sale:            
Amortized Cost $ 550,591,000   $ 365,323,000      
Gross Unrealized Gains 1,021,000   87,000      
Gross Unrealized (Losses) (3,843,000)   (7,081,000)      
Fair Value 547,769,000   358,329,000 [1]      
Allowance for Credit Losses 0   0 $ 0   $ 0
Securities held to maturity:            
Amortized Cost 283,913,000   300,653,000      
Gross Unrealized Gains 78,000   48,000      
Gross Unrealized (Losses) (12,852,000)   (21,750,000)      
Fair Value 271,139,000   278,951,000      
Allowance for Credit Losses (133,000) $ (144,000) (202,000) (261,000) $ (248,000) (348,000)
Total securities, Amortized Cost 834,504,000   665,976,000      
Total securities, Accumulated Unrecognized Gain 1,099,000   135,000      
Total securities, Accumulated Unrecognized Loss (16,695,000)   (28,831,000)      
Total securities, Fair Value 818,908,000   637,280,000      
Total securities, Allowance for Credit Losses (133,000)   (202,000)      
U.S. government and federal agencies            
Securities available for sale:            
Amortized Cost 384,409,000   207,935,000      
Gross Unrealized Gains 625,000   29,000      
Gross Unrealized (Losses) (1,012,000)   (1,561,000)      
Fair Value 384,022,000   206,403,000      
Allowance for Credit Losses 0   0 0   0
Securities held to maturity:            
Amortized Cost 115,454,000   122,452,000      
Gross Unrealized Gains 2,000   0      
Gross Unrealized (Losses) (5,554,000)   (9,181,000)      
Fair Value 109,902,000   113,271,000      
Allowance for Credit Losses 0 0 0 0 0 0
Mortgage backed securities            
Securities available for sale:            
Amortized Cost 6,359,000   7,976,000      
Gross Unrealized Gains 1,000   1,000      
Gross Unrealized (Losses) (381,000)   (582,000)      
Fair Value 5,979,000   7,395,000      
Allowance for Credit Losses 0   0      
Securities held to maturity:            
Amortized Cost 1,155,000   1,168,000      
Gross Unrealized Gains 0   0      
Gross Unrealized (Losses) (10,000)   (51,000)      
Fair Value 1,145,000   1,117,000      
Allowance for Credit Losses 0   0      
Corporate bonds            
Securities available for sale:            
Amortized Cost 56,828,000   44,707,000      
Gross Unrealized Gains 252,000   20,000      
Gross Unrealized (Losses) (228,000)   (753,000)      
Fair Value 56,852,000   43,974,000      
Allowance for Credit Losses 0   0 0   0
Securities held to maturity:            
Amortized Cost 50,815,000   57,470,000      
Gross Unrealized Gains 65,000   43,000      
Gross Unrealized (Losses) (632,000)   (1,698,000)      
Fair Value 50,248,000   55,815,000      
Allowance for Credit Losses (104,000) (114,000) (171,000) (230,000) (215,000) (322,000)
State and municipal securities            
Securities available for sale:            
Amortized Cost 102,995,000   104,705,000      
Gross Unrealized Gains 143,000   37,000      
Gross Unrealized (Losses) (2,222,000)   (4,185,000)      
Fair Value 100,916,000   100,557,000      
Allowance for Credit Losses 0   0 0   0
Securities held to maturity:            
Amortized Cost 116,489,000   119,563,000      
Gross Unrealized Gains 11,000   5,000      
Gross Unrealized (Losses) (6,656,000)   (10,820,000)      
Fair Value 109,844,000   108,748,000      
Allowance for Credit Losses $ (29,000) $ (30,000) $ (31,000) $ (31,000) $ (33,000) $ (26,000)
[1] Derived from audited consolidated financial statements.