v3.26.1
Note 6 - Debt Securities Available-for-Sale (Details) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Schedule Of Available For Sale Securities [Line Items]    
Investment debt securities available-for-sale, Fair value [1] $ 528,007 $ 542,830
Investment securities available-for-sale, debt securities gross unrealized holding gains 331 339
Investment securities available-for-sale, debt securities gross unrealized holding losses (60,125) (57,864)
Investment securities available-for-sale, debt securities gross unrealized fair value hedge gains (losses) (139) (1,692)
Investment securities available-for-sale, debt securities amortized cost 587,940 602,047
US Treasury Securities [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Investment debt securities available-for-sale, Fair value 19,435 21,583
Investment securities available-for-sale, debt securities gross unrealized holding gains 0 6
Investment securities available-for-sale, debt securities gross unrealized holding losses (2)  
Investment securities available-for-sale, debt securities amortized cost 19,437 21,577
US Government Agencies Debt Securities [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Investment debt securities available-for-sale, Fair value 70,786 70,850
Investment securities available-for-sale, debt securities gross unrealized holding losses (5,185) (5,118)
Investment securities available-for-sale, debt securities amortized cost 75,971 75,968
US States and Political Subdivisions Debt Securities [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Investment debt securities available-for-sale, Fair value [2] 87,249 88,787
Investment securities available-for-sale, debt securities gross unrealized holding losses (17,086) (15,326)
Investment securities available-for-sale, debt securities gross unrealized fair value hedge gains (losses) (82) (583)
Investment securities available-for-sale, debt securities amortized cost 104,417 104,696
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Investment debt securities available-for-sale, Fair value [2] 177,676 182,208
Investment securities available-for-sale, debt securities gross unrealized holding losses (25,553) (25,767)
Investment securities available-for-sale, debt securities gross unrealized fair value hedge gains (losses) (57) (1,109)
Investment securities available-for-sale, debt securities amortized cost 203,286 209,084
Collateralized Mortgage Obligations [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Investment debt securities available-for-sale, Fair value 145,102 149,203
Investment securities available-for-sale, debt securities gross unrealized holding gains 146 19
Investment securities available-for-sale, debt securities gross unrealized holding losses (11,469) (11,170)
Investment securities available-for-sale, debt securities amortized cost 156,425 160,354
Corporate Debt Securities and Money Market Funds [Member]    
Schedule Of Available For Sale Securities [Line Items]    
Investment debt securities available-for-sale, Fair value 27,759 30,199
Investment securities available-for-sale, debt securities gross unrealized holding gains 185 314
Investment securities available-for-sale, debt securities gross unrealized holding losses (830) (483)
Investment securities available-for-sale, debt securities amortized cost $ 28,404 $ 30,368
[1] Includes derivatives designated as fair value hedges.
[2] Includes derivatives designated as fair value hedges.