Quarterly report pursuant to Section 13 or 15(d)

Note 2 - Securities - Schedule of Securities with Unrealized Losses (Details)

v3.23.3
Note 2 - Securities - Schedule of Securities with Unrealized Losses (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Available-for-sale, fair value, less than 12 months $ 91,154 $ 322,393
Available-for-sale, accumulated loss, less than 12 months (1,794) (15,211)
Available-for-sale, fair value, more than 12 months 410,063 142,056
Available-for-sale, accumulated loss, more than 12 months (40,767) (24,932)
Available-for-sale, fair value 501,217 464,449
Available-for-sale, accumulated loss (42,561) (40,143)
Held-to-maturity, fair value, less than 12 months 14,869 295,301
Held-to-maturity, accumulated loss, less than 12 months (206) (15,991)
Held-to-maturity, fair value, more than 12 months 292,094 21,721
Held-to-maturity, accumulated loss, more than 12 months (15,394) (539)
Held-for-maturity, fair value 306,963 317,022
Held-for-sale, accumulated loss (15,600) (16,530)
US Treasury and Government [Member]    
Available-for-sale, fair value, less than 12 months 32,037 144,796
Available-for-sale, accumulated loss, less than 12 months (293) (6,230)
Available-for-sale, fair value, more than 12 months 208,077 66,008
Available-for-sale, accumulated loss, more than 12 months (15,481) (10,080)
Available-for-sale, fair value 240,114 210,804
Available-for-sale, accumulated loss (15,774) (16,310)
US Government Agencies Debt Securities [Member]    
Available-for-sale, fair value, less than 12 months 27,594 64,427
Available-for-sale, accumulated loss, less than 12 months (646) (4,789)
Available-for-sale, fair value, more than 12 months 82,369 41,340
Available-for-sale, accumulated loss, more than 12 months (16,432) (9,558)
Available-for-sale, fair value 109,963 105,767
Available-for-sale, accumulated loss (17,078) (14,347)
Nontaxable Municipal Bonds [Member]    
Available-for-sale, fair value, less than 12 months 18,452 31,337
Available-for-sale, accumulated loss, less than 12 months (692) (498)
Available-for-sale, fair value, more than 12 months 14,796 0
Available-for-sale, accumulated loss, more than 12 months (673) 0
Available-for-sale, fair value 33,248 31,337
Available-for-sale, accumulated loss (1,365) (498)
Held-to-maturity, fair value, less than 12 months 14,869 57,671
Held-to-maturity, accumulated loss, less than 12 months (206) (2,314)
Held-to-maturity, fair value, more than 12 months 53,122 21,721
Held-to-maturity, accumulated loss, more than 12 months (3,117) (539)
Held-for-maturity, fair value 67,991 79,392
Held-for-sale, accumulated loss (3,323) (2,853)
Taxable Municipal Bonds [Member]    
Available-for-sale, fair value, less than 12 months 12,611 71,165
Available-for-sale, accumulated loss, less than 12 months (153) (3,337)
Available-for-sale, fair value, more than 12 months 93,537 33,452
Available-for-sale, accumulated loss, more than 12 months (7,774) (5,188)
Available-for-sale, fair value 106,148 104,617
Available-for-sale, accumulated loss (7,927) (8,525)
Corporate Bonds And Other Debt Securities [Member]    
Available-for-sale, fair value, less than 12 months 460 10,668
Available-for-sale, accumulated loss, less than 12 months (10) (357)
Available-for-sale, fair value, more than 12 months 11,284 1,256
Available-for-sale, accumulated loss, more than 12 months (407) (106)
Available-for-sale, fair value 11,744 11,924
Available-for-sale, accumulated loss (417) (463)
US Treasury Securities [Member]    
Held-to-maturity, fair value, less than 12 months 0 237,630
Held-to-maturity, accumulated loss, less than 12 months 0 (13,677)
Held-to-maturity, fair value, more than 12 months 238,972 0
Held-to-maturity, accumulated loss, more than 12 months (12,277) 0
Held-for-maturity, fair value 238,972 237,630
Held-for-sale, accumulated loss $ (12,277) $ (13,677)