Note 4 - Loans and Allowance for Credit Losses - Allowance for Loan Losses by Portfolio Segment (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended				12 Months Ended
	Jun. 30, 2025		Jun. 30, 2024		Jun. 30, 2025		Jun. 30, 2024		Dec. 31, 2024
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance	$ 61,929		$ 36,584		$ 59,929		$ 35,843		$ 35,843
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions	1,116	[1]	4,270	[1]	3,523	[2]	5,069	[1]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs	(3,918)		(2,734)		(4,730)		(2,939)		(4,698)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery	151		212		556		359
Financing Receivable, Allowance for Credit Loss, Ending Balance	59,278		38,332		59,278		38,332		59,929
Consumer Borrower [Member]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance	9,481		7,974		9,799		7,872		7,872
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions	127	[1]	(702)	[1]	340	[2]	(601)	[1]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs	(48)		(4)		(691)		(16)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery	12		84		124		97
Financing Receivable, Allowance for Credit Loss, Ending Balance	9,572		7,352		9,572		7,352		9,799
Consumer Borrower [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance	7,960		9,508		8,170		9,705		9,705
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions	317	[1]	(663)	[1]	6	[2]	(819)	[1]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs	(79)		(2,730)		(248)		(2,894)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery	128		119		398		242
Financing Receivable, Allowance for Credit Loss, Ending Balance	8,326		6,234		8,326		6,234		8,170
Consumer Borrower [Member] | Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance	9,128		7,789		9,359		7,671		7,671
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions	91	[1]	(836)	[1]	464	[2]	(718)	[1]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs	(10)		(3)		(614)		(3)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery	0		74		0		74
Financing Receivable, Allowance for Credit Loss, Ending Balance	9,209		7,024		9,209		7,024		9,359
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Real Estate, First Lien [Member]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance	7,042		6,152		6,921		6,087		6,087
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions	17	[1]	(786)	[1]	192	[2]	(721)	[1]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs	0		0		(54)		0		0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery	0		0		0		0
Financing Receivable, Allowance for Credit Loss, Ending Balance	7,059		5,366		7,059		5,366		6,921
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Construction Loans [Member]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance	467		489		357		485		485
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions	(51)	[1]	(31)	[1]	59	[2]	(27)	[1]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs	0		0		0		0		0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery	0		0		0		0
Financing Receivable, Allowance for Credit Loss, Ending Balance	416		458		416		458		357
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Home Equity Loan [Member]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance	1,180		864		1,339		835		835
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions	188	[1]	22	[1]	279	[2]	51	[1]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs	(10)		0		(260)		0		(19)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery	0		0		0		0
Financing Receivable, Allowance for Credit Loss, Ending Balance	1,358		886		1,358		886		1,339
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Real Estate, Junior Lien [Member]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance	439		284		742		264		264
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions	(63)	[1]	(41)	[1]	(66)	[2]	(21)	[1]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs	0		(3)		(300)		(3)		(638)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery	0		74		0		74
Financing Receivable, Allowance for Credit Loss, Ending Balance	376		314		376		314		742
Consumer Borrower [Member] | Consumer Portfolio Segment [Member] | Consumer, Other [Member]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance	353		185		440		201		201
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions	36	[1]	134	[1]	(124)	[2]	117	[1]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs	(38)		(1)		(77)		(13)		(51)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery	12		10		124		23
Financing Receivable, Allowance for Credit Loss, Ending Balance	363		328		363		328		440
Commercial Borrower [Member]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance	52,448		28,610		50,130		27,971		27,971
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions	989	[1]	4,972	[1]	3,183	[2]	5,670	[1]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs	(3,870)		(2,730)		(4,039)		(2,923)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery	139		128		432		262
Financing Receivable, Allowance for Credit Loss, Ending Balance	49,706		30,980		49,706		30,980		50,130
Commercial Borrower [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs					(248)				(3,727)
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance	42,972		18,635		40,732		18,086		18,086
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions	566	[1]	5,658	[1]	2,795	[2]	6,225	[1]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs	(3,407)		0		(3,407)		(29)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery	11		9		22		20
Financing Receivable, Allowance for Credit Loss, Ending Balance	40,142		24,302		40,142		24,302		40,732
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction, Land, and Development [Member]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance	18,369		5,922		16,277		6,135		6,135
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions	160	[1]	4,898	[1]	2,252	[2]	4,685	[1]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs	0		0		0		0		0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery	0		0		0		0
Financing Receivable, Allowance for Credit Loss, Ending Balance	18,529		10,820		18,529		10,820		16,277
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Multifamily Loan [Member]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance	4,749		2,148		4,716		1,776		1,776
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions	127	[1]	282	[1]	160	[2]	654	[1]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs	0		0		0		0		0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery	0		0		0		0
Financing Receivable, Allowance for Credit Loss, Ending Balance	4,876		2,430		4,876		2,430		4,716
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Non-Owner Occupied [Member]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance	16,342		8,104		16,513		7,726		7,726
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions	(22)	[1]	668	[1]	(193)	[2]	1,046	[1]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs	(3,401)		0		(3,401)		0		0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery	0		0		0		0
Financing Receivable, Allowance for Credit Loss, Ending Balance	12,919		8,772		12,919		8,772		16,513
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Loans [Member]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance	3,512		2,461		3,226		2,449		2,449
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions	301	[1]	(190)	[1]	576	[2]	(160)	[1]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs	(6)		0		(6)		(29)		(237)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery	11		9		22		20
Financing Receivable, Allowance for Credit Loss, Ending Balance	3,818		2,280		3,818		2,280		3,226
Commercial Borrower [Member] | Agricultural Real Estate Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance	1,516		467		1,228		180		180
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions	106	[1]	(23)	[1]	382	[2]	264	[1]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs	(384)		0		(384)		0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery	0		0		12		0
Financing Receivable, Allowance for Credit Loss, Ending Balance	1,238		444		1,238		444		1,228
Commercial Borrower [Member] | Agricultural Real Estate Portfolio Segment [Member] | Land [Member]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance	603		248		597		96		96
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions	12	[1]	11	[1]	18	[2]	163	[1]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs	0		0		0		0		0
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery	0		0		0		0
Financing Receivable, Allowance for Credit Loss, Ending Balance	615		259		615		259		597
Commercial Borrower [Member] | Agricultural Real Estate Portfolio Segment [Member] | Production Loans [Member]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Beginning Balance	913		219		631		84		84
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Provisions	94	[1]	(34)	[1]	364	[2]	101	[1]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Charge-offs	(384)		0		(384)		0		(26)
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest, Recovery	0		0		12		0
Financing Receivable, Allowance for Credit Loss, Ending Balance	$ 623		$ 185		$ 623		$ 185		$ 631

[1] The difference in the credit loss expense reported herein compared to the consolidated statements of income is associated with the credit loss expense of ($1.5) million related to off-balance sheet credit exposure and ($2) thousand related to HTM investment securities.

[2] The difference in the credit loss expense reported herein compared to the consolidated statements of income is associated with the credit loss expense of ($793) million related to off-balance sheet credit exposure and ($6) thousand related to HTM investment securities.