Note 16 - Accumulated Other Comprehensive Income (Loss) - Accumulated Other Comprehensive Income (Loss) by Component (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Balance, beginning of period			$ 675,869
Balance, end of period	$ 727,754		727,754
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member]
Balance, beginning of period	(87,054)	$ 2,295	(7,657)	$ 9,310
Net current period other comprehensive loss	(40,580)	(4,453)	(119,977)	(11,468)
Balance, end of period	(127,634)	(2,158)	(127,634)	(2,158)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Balance, beginning of period	0	(58)	0	(122)
Net current period other comprehensive loss	0	32	0	96
Balance, end of period	0	(26)	0	(26)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Balance, beginning of period	(283)	(447)	(283)	(447)
Net current period other comprehensive loss	0	0	0	0
Balance, end of period	(283)	(447)	(283)	(447)
AOCI Attributable to Parent [Member]
Balance, beginning of period	(87,337)	1,790	(7,940)	8,741
Net current period other comprehensive loss	(40,580)	(4,421)	(119,977)	(11,372)
Balance, end of period	$ (127,917)	$ (2,631)	$ (127,917)	$ (2,631)