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)

v3.22.2.2
Note 4 - Securities - Amortized Cost and Fair Value of Available-for-sale and Held-to-maturity Securities (Details) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Available for sale, amortized cost $ 727,663 $ 830,546
Available for sale, gross unrealized gain 10 15,425
Available for sale, gross unrealized loss (61,910) (3,402)
Available for sale, fair value 665,763 842,570 [1]
Held to maturity, amortized cost 1,048,840 462,957
Held to maturity, gross unrealized gain 5 5,278
Held to maturity, gross unrealized loss (106,563) (1,949)
Held to maturity debt securities, fair value 942,282 466,286 [1]
US Treasury Securities [Member]    
Available for sale, amortized cost 6,003 9,003
Available for sale, gross unrealized gain 0 101
Available for sale, gross unrealized loss (51) 0
Available for sale, fair value 5,952 9,104
Held to maturity, amortized cost 506,697 149,263
Held to maturity, gross unrealized gain 0 25
Held to maturity, gross unrealized loss (38,184) (668)
Held to maturity debt securities, fair value 468,513 148,620
US Government Agencies Debt Securities [Member]    
Available for sale, amortized cost 9 6,022
Available for sale, gross unrealized gain 0 19
Available for sale, gross unrealized loss 0 0
Available for sale, fair value 9 6,041
Collateralized Mortgage-Backed Securities [Member]    
Available for sale, amortized cost 294,289 424,372
Available for sale, gross unrealized gain 3 3,474
Available for sale, gross unrealized loss (36,528) (2,685)
Available for sale, fair value 257,764 425,161
Held to maturity, amortized cost 534,107 310,641
Held to maturity, gross unrealized gain 5 5,251
Held to maturity, gross unrealized loss (67,336) (1,271)
Held to maturity debt securities, fair value 466,776 314,621
US States and Political Subdivisions Debt Securities [Member]    
Available for sale, amortized cost 16,677 21,531
Available for sale, gross unrealized gain 2 173
Available for sale, gross unrealized loss (1,659) (70)
Available for sale, fair value 15,020 21,634
Held to maturity, amortized cost 8,036 3,053
Held to maturity, gross unrealized gain 0 2
Held to maturity, gross unrealized loss (1,043) (10)
Held to maturity debt securities, fair value 6,993 3,045
Corporate Debt Securities [Member]    
Available for sale, amortized cost 410,685 369,618
Available for sale, gross unrealized gain 5 11,659
Available for sale, gross unrealized loss (23,671) (647)
Available for sale, fair value $ 387,019 $ 380,630
[1] derived from audited financial statements.