Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Securities - Amortized Cost and Fair Value of Available-for-sale and Held-to-maturity Securities (Details)

v3.24.2.u1
Note 4 - Securities - Amortized Cost and Fair Value of Available-for-sale and Held-to-maturity Securities (Details) - USD ($)
Jun. 30, 2024
Dec. 31, 2023
Available for sale, amortized cost $ 1,239,512,000 $ 969,090,000
Available for sale, gross unrealized gain 40,000 258,000
Available for sale, gross unrealized loss (65,166,000) (69,166,000)
Available for sale, fair value 1,174,386,000 900,183,000
Held to maturity, amortized cost 767,255,000 982,664,000
Held to maturity, gross unrealized gain 18,000 3,000
Held to maturity, gross unrealized loss (83,039,000) (75,475,000)
Held to maturity debt securities, fair value 684,234,000 907,191,000
US Treasury Securities [Member]    
Available for sale, amortized cost 609,123,000 340,556,000
Available for sale, gross unrealized gain 38,000 251,000
Available for sale, gross unrealized loss (340,000) 0
Available for sale, fair value 608,821,000 340,807,000
Held to maturity, amortized cost 274,270,000 508,985,000
Held to maturity, gross unrealized gain 0 0
Held to maturity, gross unrealized loss (23,932,000) (24,718,000)
Held to maturity debt securities, fair value 250,338,000 484,267,000
Collateralized Mortgage-Backed Securities [Member]    
Available for sale, amortized cost 268,557,000 241,458,000
Available for sale, gross unrealized gain 1,000 6,000
Available for sale, gross unrealized loss (27,195,000) (25,979,000)
Available for sale, fair value 241,363,000 215,485,000
Held to maturity, amortized cost 484,911 465,615
Held to maturity, gross unrealized gain 18,000 3,000
Held to maturity, gross unrealized loss (58,379,000) (50,025,000)
Held to maturity debt securities, fair value 426,550,000 415,593,000
US States and Political Subdivisions Debt Securities [Member]    
Available for sale, amortized cost 11,140,000 11,400,000
Available for sale, gross unrealized gain 1,000 1,000
Available for sale, gross unrealized loss (1,162,000) (1,178,000)
Available for sale, fair value 9,979,000 10,223,000
Held to maturity, amortized cost 8,074,000 8,063,000
Held to maturity, gross unrealized gain 0 0
Held to maturity, gross unrealized loss (728,000) (732,000)
Held to maturity debt securities, fair value 7,346,000 7,331,000
Corporate Debt Securities [Member]    
Available for sale, amortized cost 350,692,000 375,676,000
Available for sale, gross unrealized gain 0 0
Available for sale, gross unrealized loss (36,469,000) (42,009,000)
Available for sale, fair value $ 314,223,000 $ 333,667,000