Note B - Securities - Amortized Cost and Fair Value Of Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Available for sale securities, amortized cost	$ 397,926	$ 378,961
Available for sale securities, gross unrealized gains	38	2,370
Available for sale securities, gross unrealized losses	(47,796)	(4,528)
Available for sale securities	350,168	376,803
Held to maturity securities	195,217	110,208
Held to maturity securities, gross unrealized gains	52	1,760
Held to maturity securities, gross unrealized losses	(15,219)	(628)
Held to maturity securities, fair value	180,050	111,340
US Treasury Securities [Member]
Available for sale securities, amortized cost	118,782	73,889
Available for sale securities, gross unrealized gains
Available for sale securities, gross unrealized losses	(10,414)	(735)
Available for sale securities	108,368	73,154
Held to maturity securities	94,339
Held to maturity securities, gross unrealized gains
Held to maturity securities, gross unrealized losses	(1,288)
Held to maturity securities, fair value	93,051
Collateralized Mortgage-Backed Securities [Member]
Available for sale securities, amortized cost	61,280	71,187
Available for sale securities, gross unrealized gains	36	1,236
Available for sale securities, gross unrealized losses	(4,877)	(441)
Available for sale securities	56,439	71,982
Collateralized Mortgage Obligations [Member]
Available for sale securities, amortized cost	115,436	130,181
Available for sale securities, gross unrealized gains		841
Available for sale securities, gross unrealized losses	(8,059)	(1,035)
Available for sale securities	107,377	129,987
US States and Political Subdivisions Debt Securities [Member]
Available for sale securities, amortized cost	102,428	103,704
Available for sale securities, gross unrealized gains	2	293
Available for sale securities, gross unrealized losses	(24,446)	(2,317)
Available for sale securities	77,984	101,680
Held to maturity securities	100,878	110,208
Held to maturity securities, gross unrealized gains	52	1,760
Held to maturity securities, gross unrealized losses	(13,931)	(628)
Held to maturity securities, fair value	$ 86,999	$ 111,340

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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