v3.26.1
Note 3 - Debt Securities Available for Sale and Held to Maturity - Gross Unrealized Losses, Investment Securities Portfolio (Details)
$ in Thousands
Mar. 31, 2026
USD ($)
Dec. 31, 2025
USD ($)
Available for sale securities, less than 12 months, number of investment positions 120 62
Held to Maturity securities, less than 12 months, number of investment positions 25 0
Available for sale securities, less than 12 months, fair value $ 933,964 $ 474,949
Held to Maturity securities, less than 12 months, fair value 227,213 0
Available for sale securities, less than 12 months, unrealized loss (11,674) (3,636)
Held to Maturity securities, less than 12 months, unrealized loss $ (917) $ 0
Available for sale securities, 12 months or longer, number of investment positions 276 288
Held to Maturity securities, 12 months or longer, number of investment positions 87 99
Available for sale securities, 12 months or longer, fair value $ 2,239,865 $ 2,349,226
Held to Maturity securities, 12 months or longer, fair value 402,789 416,031
Available for sale securities, 12 months or longer, unrealized loss (141,894) (127,837)
Held to Maturity securities, 12 months or longer, unrealized loss $ (15,071) $ (10,276)
Available for sale securities, total, number of investment positions 396 350
Held to Maturity securities, total, number of investment positions 112 99
Available for sale securities, total, fair value $ 3,173,829 $ 2,824,175
Held to Maturity securities, total, fair value 630,002 416,031
Available for sale securities, total, unrealized loss (153,568) (131,473)
Held to Maturity securities, total, unrealized loss $ (15,988) $ (10,276)
Agency Residential MBS [Member]    
Available for sale securities, less than 12 months, number of investment positions 4 2
Held to Maturity securities, less than 12 months, number of investment positions 0 0
Available for sale securities, less than 12 months, fair value $ 13,297 $ 10,541
Held to Maturity securities, less than 12 months, fair value 0 0
Available for sale securities, less than 12 months, unrealized loss (204) (147)
Held to Maturity securities, less than 12 months, unrealized loss $ 0 $ 0
Available for sale securities, 12 months or longer, number of investment positions 104 107
Held to Maturity securities, 12 months or longer, number of investment positions 54 59
Available for sale securities, 12 months or longer, fair value $ 163,509 $ 173,186
Held to Maturity securities, 12 months or longer, fair value 38,020 40,523
Available for sale securities, 12 months or longer, unrealized loss (10,484) (9,909)
Held to Maturity securities, 12 months or longer, unrealized loss $ (2,311) $ (2,231)
Available for sale securities, total, number of investment positions 108 109
Held to Maturity securities, total, number of investment positions 54 59
Available for sale securities, total, fair value $ 176,806 $ 183,727
Held to Maturity securities, total, fair value 38,020 40,523
Available for sale securities, total, unrealized loss (10,688) (10,056)
Held to Maturity securities, total, unrealized loss $ (2,311) $ (2,231)
US States and Political Subdivisions Debt Securities [Member]    
Available for sale securities, less than 12 months, number of investment positions 2 2
Held to Maturity securities, less than 12 months, number of investment positions 1 0
Available for sale securities, less than 12 months, fair value $ 4,201 $ 3,382
Held to Maturity securities, less than 12 months, fair value 624 0
Available for sale securities, less than 12 months, unrealized loss (23) (1)
Held to Maturity securities, less than 12 months, unrealized loss $ (1) $ 0
Available for sale securities, 12 months or longer, number of investment positions 28 28
Held to Maturity securities, 12 months or longer, number of investment positions 10 17
Available for sale securities, 12 months or longer, fair value $ 36,135 $ 37,520
Held to Maturity securities, 12 months or longer, fair value 9,344 16,087
Available for sale securities, 12 months or longer, unrealized loss (679) (542)
Held to Maturity securities, 12 months or longer, unrealized loss $ (15) $ (36)
Available for sale securities, total, number of investment positions 30 30
Held to Maturity securities, total, number of investment positions 11 17
Available for sale securities, total, fair value $ 40,336 $ 40,902
Held to Maturity securities, total, fair value 9,968 16,087
Available for sale securities, total, unrealized loss (702) (543)
Held to Maturity securities, total, unrealized loss $ (16) $ (36)
Agency Commercial MBS [Member]    
Available for sale securities, less than 12 months, number of investment positions 99 56
Available for sale securities, less than 12 months, fair value $ 809,211 $ 438,102
Available for sale securities, less than 12 months, unrealized loss $ (10,564) $ (3,411)
Available for sale securities, 12 months or longer, number of investment positions 0 0
Available for sale securities, 12 months or longer, fair value $ 0 $ 0
Available for sale securities, 12 months or longer, unrealized loss $ 0 $ 0
Available for sale securities, total, number of investment positions 99 56
Available for sale securities, total, fair value $ 809,211 $ 438,102
Available for sale securities, total, unrealized loss $ (10,564) $ (3,411)
Corporate Debt Securities [Member]    
Available for sale securities, less than 12 months, number of investment positions 12 0
Held to Maturity securities, less than 12 months, number of investment positions 24 0
Available for sale securities, less than 12 months, fair value $ 78,980 $ 0
Held to Maturity securities, less than 12 months, fair value 226,589 0
Available for sale securities, less than 12 months, unrealized loss (777) 0
Held to Maturity securities, less than 12 months, unrealized loss $ (916) $ 0
Available for sale securities, 12 months or longer, number of investment positions 124 129
Held to Maturity securities, 12 months or longer, number of investment positions 23 23
Available for sale securities, 12 months or longer, fair value $ 1,746,543 $ 1,804,080
Held to Maturity securities, 12 months or longer, fair value 355,425 359,421
Available for sale securities, 12 months or longer, unrealized loss (121,339) (109,473)
Held to Maturity securities, 12 months or longer, unrealized loss $ (12,745) $ (8,009)
Available for sale securities, total, number of investment positions 136 129
Held to Maturity securities, total, number of investment positions 47 23
Available for sale securities, total, fair value $ 1,825,523 $ 1,804,080
Held to Maturity securities, total, fair value 582,014 359,421
Available for sale securities, total, unrealized loss (122,116) (109,473)
Held to Maturity securities, total, unrealized loss $ (13,661) $ (8,009)
US Government Agencies Debt Securities [Member]    
Available for sale securities, less than 12 months, number of investment positions 1 0
Available for sale securities, less than 12 months, fair value $ 5,351 $ 0
Available for sale securities, less than 12 months, unrealized loss $ (30) $ 0
Available for sale securities, 12 months or longer, number of investment positions 18 19
Available for sale securities, 12 months or longer, fair value $ 282,938 $ 284,747
Available for sale securities, 12 months or longer, unrealized loss $ (9,177) $ (6,739)
Available for sale securities, total, number of investment positions 19 19
Available for sale securities, total, fair value $ 288,289 $ 284,747
Available for sale securities, total, unrealized loss $ (9,207) $ (6,739)
Collateralized Debt Obligations [Member]    
Available for sale securities, less than 12 months, number of investment positions 2 2
Available for sale securities, less than 12 months, fair value $ 22,924 $ 22,924
Available for sale securities, less than 12 months, unrealized loss $ (76) $ (77)
Available for sale securities, 12 months or longer, number of investment positions 2 5
Available for sale securities, 12 months or longer, fair value $ 10,740 $ 49,693
Available for sale securities, 12 months or longer, unrealized loss $ (215) $ (1,174)
Available for sale securities, total, number of investment positions 4 7
Available for sale securities, total, fair value $ 33,664 $ 72,617
Available for sale securities, total, unrealized loss $ (291) $ (1,251)