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Note 4 - Loans and Allowance for Credit Losses - Schedule of Financing Receivable Credit Quality Indicators (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Current Fiscal Year	$ 353,373		$ 353,373		$ 713,598
Fiscal Year before Current Fiscal Year	727,811		727,811		712,874
Two Years before Current Fiscal Year	663,318		663,318		853,524
Three Years before Current Fiscal Year	758,829		758,829		503,370
Four Years before Current Fiscal Year	444,700		444,700		360,131
More than Four Years before Current Fiscal Year	719,986		719,986		527,593
Revolving	434,058		434,058		321,444
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	4,102,075		4,102,075		3,992,534
Current Fiscal Year, Gross Charge-offs			0		0
Fiscal Year before Current Fiscal Year, Gross Charge-offs			516		238
Two Years before Current Fiscal Year, Gross Charge-offs			197		102
Three Years before Current Fiscal Year, Gross Charge-offs			1,588		547
Four Years before Current Fiscal Year, Gross Charge-offs			787		2,772
More than Four Years before Current Fiscal Year, Gross Charge-offs			2,381		1,174
Revolving, Gross Charge-offs			0		0
Loans, Gross Charge-offs	740	$ 505	5,469	$ 3,444	4,833
Commercial Borrower [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	2,856,720		2,856,720		2,787,277
Loans, Gross Charge-offs	606	344	4,643	3,267
Commercial Borrower [Member] | Commercial Portfolio Segment [Member]
Current Fiscal Year	161,487		161,487		210,368
Fiscal Year before Current Fiscal Year	171,328		171,328		154,186
Two Years before Current Fiscal Year	89,308		89,308		64,760
Three Years before Current Fiscal Year	50,929		50,929		37,664
Four Years before Current Fiscal Year	24,342		24,342		47,071
More than Four Years before Current Fiscal Year	57,986		57,986		38,635
Revolving	146,755		146,755		114,043
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	702,135		702,135		666,727
Current Fiscal Year, Gross Charge-offs			0		0
Fiscal Year before Current Fiscal Year, Gross Charge-offs			407		218
Two Years before Current Fiscal Year, Gross Charge-offs			152		2
Three Years before Current Fiscal Year, Gross Charge-offs			0		397
Four Years before Current Fiscal Year, Gross Charge-offs			5		2,768
More than Four Years before Current Fiscal Year, Gross Charge-offs			290		342
Revolving, Gross Charge-offs			0		0
Loans, Gross Charge-offs			854		3,727
Commercial Borrower [Member] | Commercial Portfolio Segment [Member] | Pass [Member]
Current Fiscal Year	159,909		159,909		209,001
Fiscal Year before Current Fiscal Year	161,291		161,291		141,028
Two Years before Current Fiscal Year	84,573		84,573		61,254
Three Years before Current Fiscal Year	47,395		47,395		34,645
Four Years before Current Fiscal Year	23,382		23,382		38,342
More than Four Years before Current Fiscal Year	51,156		51,156		36,136
Revolving	134,079		134,079		111,194
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	661,785		661,785		631,600
Commercial Borrower [Member] | Commercial Portfolio Segment [Member] | Special Mention [Member]
Current Fiscal Year	324		324		1,367
Fiscal Year before Current Fiscal Year	10		10		495
Two Years before Current Fiscal Year	26		26		3,286
Three Years before Current Fiscal Year	0		0		2,239
Four Years before Current Fiscal Year	651		651		5,575
More than Four Years before Current Fiscal Year	44		44		1
Revolving	0		0		1,651
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	1,055		1,055		14,614
Commercial Borrower [Member] | Commercial Portfolio Segment [Member] | Substandard [Member]
Current Fiscal Year	36		36		0
Fiscal Year before Current Fiscal Year	1,255		1,255		12,663
Two Years before Current Fiscal Year	2,946		2,946		220
Three Years before Current Fiscal Year	3,236		3,236		780
Four Years before Current Fiscal Year	195		195		3,154
More than Four Years before Current Fiscal Year	6,786		6,786		2,447
Revolving	12,676		12,676		1,198
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	27,130		27,130		20,462
Commercial Borrower [Member] | Commercial Portfolio Segment [Member] | Doubtful [Member]
Current Fiscal Year	1,218		1,218		0
Fiscal Year before Current Fiscal Year	8,772		8,772		0
Two Years before Current Fiscal Year	1,763		1,763		0
Three Years before Current Fiscal Year	298		298		0
Four Years before Current Fiscal Year	114		114		0
More than Four Years before Current Fiscal Year	0		0		51
Revolving	0		0		0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	12,165		12,165		51
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	2,025,634		2,025,634		1,996,243
Loans, Gross Charge-offs	(0)	98	3,405	127
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction, Land, and Development [Member]
Current Fiscal Year	13,807		13,807		102,650
Fiscal Year before Current Fiscal Year	167,636		167,636		112,845
Two Years before Current Fiscal Year	110,795		110,795		72,647
Three Years before Current Fiscal Year	49,636		49,636		1,560
Four Years before Current Fiscal Year	658		658		517
More than Four Years before Current Fiscal Year	1,282		1,282		1,357
Revolving	5,954		5,954		3,101
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	349,768		349,768		294,677
Current Fiscal Year, Gross Charge-offs			0		0
Fiscal Year before Current Fiscal Year, Gross Charge-offs			0		0
Two Years before Current Fiscal Year, Gross Charge-offs			0		0
Three Years before Current Fiscal Year, Gross Charge-offs			0		0
Four Years before Current Fiscal Year, Gross Charge-offs			0		0
More than Four Years before Current Fiscal Year, Gross Charge-offs			0		0
Revolving, Gross Charge-offs			0		0
Loans, Gross Charge-offs	(0)	(0)	(0)	(0)	0
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Multifamily Loan [Member]
Current Fiscal Year	5,158		5,158		35,112
Fiscal Year before Current Fiscal Year	31,935		31,935		62,982
Two Years before Current Fiscal Year	86,801		86,801		146,342
Three Years before Current Fiscal Year	135,928		135,928		34,054
Four Years before Current Fiscal Year	33,600		33,600		52,130
More than Four Years before Current Fiscal Year	81,339		81,339		32,503
Revolving	0		0		0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	374,761		374,761		363,123
Current Fiscal Year, Gross Charge-offs			0		0
Fiscal Year before Current Fiscal Year, Gross Charge-offs			0		0
Two Years before Current Fiscal Year, Gross Charge-offs			0		0
Three Years before Current Fiscal Year, Gross Charge-offs			0		0
Four Years before Current Fiscal Year, Gross Charge-offs			0		0
More than Four Years before Current Fiscal Year, Gross Charge-offs			0		0
Revolving, Gross Charge-offs			0		0
Loans, Gross Charge-offs	(0)	(0)	(0)	(0)	0
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Non-Owner Occupied [Member]
Current Fiscal Year	52,409		52,409		189,068
Fiscal Year before Current Fiscal Year	184,088		184,088		149,368
Two Years before Current Fiscal Year	156,723		156,723		225,043
Three Years before Current Fiscal Year	196,223		196,223		114,679
Four Years before Current Fiscal Year	91,412		91,412		77,779
More than Four Years before Current Fiscal Year	182,959		182,959		205,184
Revolving	1,971		1,971		5,904
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	865,785		865,785		967,025
Current Fiscal Year, Gross Charge-offs			0		0
Fiscal Year before Current Fiscal Year, Gross Charge-offs			0		0
Two Years before Current Fiscal Year, Gross Charge-offs			0		0
Three Years before Current Fiscal Year, Gross Charge-offs			632		0
Four Years before Current Fiscal Year, Gross Charge-offs			775		0
More than Four Years before Current Fiscal Year, Gross Charge-offs			1,994		0
Revolving, Gross Charge-offs			0		0
Loans, Gross Charge-offs	(0)	(0)	3,401	(0)	0
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Loans [Member]
Current Fiscal Year	37,951		37,951		64,172
Fiscal Year before Current Fiscal Year	87,597		87,597		42,229
Two Years before Current Fiscal Year	57,597		57,597		63,811
Three Years before Current Fiscal Year	65,288		65,288		48,588
Four Years before Current Fiscal Year	43,234		43,234		41,922
More than Four Years before Current Fiscal Year	142,062		142,062		108,077
Revolving	1,591		1,591		2,619
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	435,320		435,320		371,418
Current Fiscal Year, Gross Charge-offs			0		0
Fiscal Year before Current Fiscal Year, Gross Charge-offs			0		12
Two Years before Current Fiscal Year, Gross Charge-offs			4		97
Three Years before Current Fiscal Year, Gross Charge-offs			0		0
Four Years before Current Fiscal Year, Gross Charge-offs			0		0
More than Four Years before Current Fiscal Year, Gross Charge-offs			0		128
Revolving, Gross Charge-offs			0		0
Loans, Gross Charge-offs	(0)	98	4	127	237
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Pass [Member] | Construction, Land, and Development [Member]
Current Fiscal Year	13,807		13,807		97,244
Fiscal Year before Current Fiscal Year	157,432		157,432		112,845
Two Years before Current Fiscal Year	110,795		110,795		40,890
Three Years before Current Fiscal Year	21,082		21,082		1,560
Four Years before Current Fiscal Year	658		658		517
More than Four Years before Current Fiscal Year	1,117		1,117		1,187
Revolving	5,654		5,654		2,801
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	310,545		310,545		257,044
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Pass [Member] | Multifamily Loan [Member]
Current Fiscal Year	5,158		5,158		35,112
Fiscal Year before Current Fiscal Year	26,181		26,181		62,982
Two Years before Current Fiscal Year	82,828		82,828		138,698
Three Years before Current Fiscal Year	112,681		112,681		33,782
Four Years before Current Fiscal Year	32,774		32,774		33,157
More than Four Years before Current Fiscal Year	62,160		62,160		32,204
Revolving	0		0		0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	321,782		321,782		335,935
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Pass [Member] | Non-Owner Occupied [Member]
Current Fiscal Year	52,409		52,409		189,068
Fiscal Year before Current Fiscal Year	184,088		184,088		149,368
Two Years before Current Fiscal Year	151,333		151,333		223,349
Three Years before Current Fiscal Year	196,223		196,223		98,309
Four Years before Current Fiscal Year	88,658		88,658		71,432
More than Four Years before Current Fiscal Year	173,692		173,692		188,617
Revolving	1,971		1,971		1,709
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	848,374		848,374		921,852
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Pass [Member] | Owner Occupied Loans [Member]
Current Fiscal Year	36,260		36,260		63,721
Fiscal Year before Current Fiscal Year	87,147		87,147		41,918
Two Years before Current Fiscal Year	56,121		56,121		60,788
Three Years before Current Fiscal Year	62,381		62,381		44,957
Four Years before Current Fiscal Year	40,876		40,876		38,941
More than Four Years before Current Fiscal Year	133,091		133,091		91,804
Revolving	1,283		1,283		1,652
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	417,159		417,159		343,781
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] | Construction, Land, and Development [Member]
Current Fiscal Year	0		0		0
Fiscal Year before Current Fiscal Year	0		0		0
Two Years before Current Fiscal Year	0		0		172
Three Years before Current Fiscal Year	176		176		0
Four Years before Current Fiscal Year	0		0		0
More than Four Years before Current Fiscal Year	0		0		0
Revolving	0		0		0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	176		176		172
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] | Multifamily Loan [Member]
Current Fiscal Year	0		0		0
Fiscal Year before Current Fiscal Year	0		0		0
Two Years before Current Fiscal Year	0		0		7,644
Three Years before Current Fiscal Year	23,247		23,247		272
Four Years before Current Fiscal Year	826		826		1,241
More than Four Years before Current Fiscal Year	1,030		1,030		0
Revolving	0		0		0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	25,103		25,103		9,157
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] | Non-Owner Occupied [Member]
Current Fiscal Year	0		0		0
Fiscal Year before Current Fiscal Year	0		0		0
Two Years before Current Fiscal Year	0		0		1,694
Three Years before Current Fiscal Year	0		0		8,603
Four Years before Current Fiscal Year	0		0		0
More than Four Years before Current Fiscal Year	1,053		1,053		4,148
Revolving	0		0		4,195
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	1,053		1,053		18,640
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] | Owner Occupied Loans [Member]
Current Fiscal Year	1,691		1,691		451
Fiscal Year before Current Fiscal Year	450		450		0
Two Years before Current Fiscal Year	0		0		0
Three Years before Current Fiscal Year	0		0		937
Four Years before Current Fiscal Year	0		0		2,981
More than Four Years before Current Fiscal Year	1,456		1,456		2,735
Revolving	308		308		0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	3,905		3,905		7,104
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] | Construction, Land, and Development [Member]
Current Fiscal Year	0		0		5,406
Fiscal Year before Current Fiscal Year	10,204		10,204		0
Two Years before Current Fiscal Year	0		0		31,585
Three Years before Current Fiscal Year	28,378		28,378		0
Four Years before Current Fiscal Year	0		0		0
More than Four Years before Current Fiscal Year	165		165		170
Revolving	300		300		300
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	39,047		39,047		37,461
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] | Multifamily Loan [Member]
Current Fiscal Year	0		0		0
Fiscal Year before Current Fiscal Year	5,754		5,754		0
Two Years before Current Fiscal Year	3,973		3,973		0
Three Years before Current Fiscal Year	0		0		0
Four Years before Current Fiscal Year	0		0		17,732
More than Four Years before Current Fiscal Year	18,149		18,149		299
Revolving	0		0		0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	27,876		27,876		18,031
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] | Non-Owner Occupied [Member]
Current Fiscal Year	0		0		0
Fiscal Year before Current Fiscal Year	0		0		0
Two Years before Current Fiscal Year	5,390		5,390		0
Three Years before Current Fiscal Year	0		0		7,767
Four Years before Current Fiscal Year	2,754		2,754		6,347
More than Four Years before Current Fiscal Year	8,214		8,214		12,419
Revolving	0		0		0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	16,358		16,358		26,533
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] | Owner Occupied Loans [Member]
Current Fiscal Year	0		0		0
Fiscal Year before Current Fiscal Year	0		0		311
Two Years before Current Fiscal Year	1,476		1,476		3,023
Three Years before Current Fiscal Year	2,907		2,907		2,694
Four Years before Current Fiscal Year	2,358		2,358		0
More than Four Years before Current Fiscal Year	7,515		7,515		13,538
Revolving	0		0		967
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	14,256		14,256		20,533
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member] | Construction, Land, and Development [Member]
Current Fiscal Year	0		0		0
Fiscal Year before Current Fiscal Year	0		0		0
Two Years before Current Fiscal Year	0		0		0
Three Years before Current Fiscal Year	0		0		0
Four Years before Current Fiscal Year	0		0		0
More than Four Years before Current Fiscal Year	0		0		0
Revolving	0		0		0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	0		0		0
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member] | Multifamily Loan [Member]
Current Fiscal Year	0		0		0
Fiscal Year before Current Fiscal Year	0		0		0
Two Years before Current Fiscal Year	0		0		0
Three Years before Current Fiscal Year	0		0		0
Four Years before Current Fiscal Year	0		0		0
More than Four Years before Current Fiscal Year	0		0		0
Revolving	0		0		0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	0		0		0
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member] | Non-Owner Occupied [Member]
Current Fiscal Year	0		0		0
Fiscal Year before Current Fiscal Year	0		0		0
Two Years before Current Fiscal Year	0		0		0
Three Years before Current Fiscal Year	0		0		0
Four Years before Current Fiscal Year	0		0		0
More than Four Years before Current Fiscal Year	0		0		0
Revolving	0		0		0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	0		0		0
Commercial Borrower [Member] | Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member] | Owner Occupied Loans [Member]
Current Fiscal Year	0		0		0
Fiscal Year before Current Fiscal Year	0		0		0
Two Years before Current Fiscal Year	0		0		0
Three Years before Current Fiscal Year	0		0		0
Four Years before Current Fiscal Year	0		0		0
More than Four Years before Current Fiscal Year	0		0		0
Revolving	0		0		0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	0		0		0
Commercial Borrower [Member] | Agricultural Real Estate Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	128,951		128,951		124,307
Loans, Gross Charge-offs	(0)	(0)	384	(0)
Commercial Borrower [Member] | Agricultural Real Estate Portfolio Segment [Member] | Land [Member]
Current Fiscal Year	8,119		8,119		10,565
Fiscal Year before Current Fiscal Year	8,857		8,857		10,779
Two Years before Current Fiscal Year	8,785		8,785		19,810
Three Years before Current Fiscal Year	19,528		19,528		5,840
Four Years before Current Fiscal Year	5,214		5,214		5,712
More than Four Years before Current Fiscal Year	13,495		13,495		8,473
Revolving	1,902		1,902		120
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	65,900		65,900		61,299
Current Fiscal Year, Gross Charge-offs			0		0
Fiscal Year before Current Fiscal Year, Gross Charge-offs			0		0
Two Years before Current Fiscal Year, Gross Charge-offs			0		0
Three Years before Current Fiscal Year, Gross Charge-offs			0		0
Four Years before Current Fiscal Year, Gross Charge-offs			0		0
More than Four Years before Current Fiscal Year, Gross Charge-offs			0		0
Revolving, Gross Charge-offs			0		0
Loans, Gross Charge-offs	(0)	(0)	(0)	(0)	0
Commercial Borrower [Member] | Agricultural Real Estate Portfolio Segment [Member] | Production Loans [Member]
Current Fiscal Year	6,393		6,393		10,575
Fiscal Year before Current Fiscal Year	7,336		7,336		7,144
Two Years before Current Fiscal Year	5,885		5,885		6,343
Three Years before Current Fiscal Year	5,053		5,053		724
Four Years before Current Fiscal Year	484		484		1,541
More than Four Years before Current Fiscal Year	1,349		1,349		636
Revolving	36,551		36,551		36,045
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	63,051		63,051		63,008
Current Fiscal Year, Gross Charge-offs			0		0
Fiscal Year before Current Fiscal Year, Gross Charge-offs			0		0
Two Years before Current Fiscal Year, Gross Charge-offs			0		0
Three Years before Current Fiscal Year, Gross Charge-offs			384		0
Four Years before Current Fiscal Year, Gross Charge-offs			0		0
More than Four Years before Current Fiscal Year, Gross Charge-offs			0		26
Revolving, Gross Charge-offs			0		0
Loans, Gross Charge-offs	(0)	(0)	384	(0)	26
Commercial Borrower [Member] | Agricultural Real Estate Portfolio Segment [Member] | Pass [Member] | Land [Member]
Current Fiscal Year	7,878		7,878		10,496
Fiscal Year before Current Fiscal Year	8,857		8,857		8,864
Two Years before Current Fiscal Year	8,482		8,482		14,369
Three Years before Current Fiscal Year	12,545		12,545		5,840
Four Years before Current Fiscal Year	5,214		5,214		5,103
More than Four Years before Current Fiscal Year	12,738		12,738		8,473
Revolving	1,902		1,902		120
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	57,616		57,616		53,265
Commercial Borrower [Member] | Agricultural Real Estate Portfolio Segment [Member] | Pass [Member] | Production Loans [Member]
Current Fiscal Year	6,393		6,393		10,445
Fiscal Year before Current Fiscal Year	7,240		7,240		6,440
Two Years before Current Fiscal Year	5,206		5,206		4,356
Three Years before Current Fiscal Year	3,816		3,816		724
Four Years before Current Fiscal Year	456		456		1,121
More than Four Years before Current Fiscal Year	811		811		582
Revolving	35,233		35,233		34,527
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	59,155		59,155		58,195
Commercial Borrower [Member] | Agricultural Real Estate Portfolio Segment [Member] | Special Mention [Member] | Land [Member]
Current Fiscal Year	241		241		69
Fiscal Year before Current Fiscal Year	0		0		1,612
Two Years before Current Fiscal Year	0		0		3,275
Three Years before Current Fiscal Year	3,372		3,372		0
Four Years before Current Fiscal Year	0		0		0
More than Four Years before Current Fiscal Year	0		0		0
Revolving	0		0		0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	3,613		3,613		4,956
Commercial Borrower [Member] | Agricultural Real Estate Portfolio Segment [Member] | Special Mention [Member] | Production Loans [Member]
Current Fiscal Year	0		0		130
Fiscal Year before Current Fiscal Year	74		74		704
Two Years before Current Fiscal Year	133		133		0
Three Years before Current Fiscal Year	0		0		0
Four Years before Current Fiscal Year	0		0		420
More than Four Years before Current Fiscal Year	538		538		0
Revolving	224		224		1,518
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	969		969		2,772
Commercial Borrower [Member] | Agricultural Real Estate Portfolio Segment [Member] | Substandard [Member] | Land [Member]
Current Fiscal Year	0		0		0
Fiscal Year before Current Fiscal Year	0		0		303
Two Years before Current Fiscal Year	303		303		2,166
Three Years before Current Fiscal Year	3,611		3,611		0
Four Years before Current Fiscal Year	0		0		609
More than Four Years before Current Fiscal Year	757		757		0
Revolving	0		0		0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	4,671		4,671		3,078
Commercial Borrower [Member] | Agricultural Real Estate Portfolio Segment [Member] | Substandard [Member] | Production Loans [Member]
Current Fiscal Year	0		0		0
Fiscal Year before Current Fiscal Year	22		22		0
Two Years before Current Fiscal Year	546		546		1,987
Three Years before Current Fiscal Year	1,237		1,237		0
Four Years before Current Fiscal Year	28		28		0
More than Four Years before Current Fiscal Year	0		0		54
Revolving	1,094		1,094		0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	2,927		2,927		2,041
Commercial Borrower [Member] | Agricultural Real Estate Portfolio Segment [Member] | Doubtful [Member] | Land [Member]
Current Fiscal Year	0		0		0
Fiscal Year before Current Fiscal Year	0		0		0
Two Years before Current Fiscal Year	0		0		0
Three Years before Current Fiscal Year	0		0		0
Four Years before Current Fiscal Year	0		0		0
More than Four Years before Current Fiscal Year	0		0		0
Revolving	0		0		0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	0		0		0
Commercial Borrower [Member] | Agricultural Real Estate Portfolio Segment [Member] | Doubtful [Member] | Production Loans [Member]
Current Fiscal Year	0		0		0
Fiscal Year before Current Fiscal Year	0		0		0
Two Years before Current Fiscal Year	0		0		0
Three Years before Current Fiscal Year	0		0		0
Four Years before Current Fiscal Year	0		0		0
More than Four Years before Current Fiscal Year	0		0		0
Revolving	0		0		0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	0		0		0
Consumer Borrower [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss					1,205,257
Loans, Gross Charge-offs	134	161	826	177
Consumer Borrower [Member] | Commercial Portfolio Segment [Member]
Loans, Gross Charge-offs	606	246	854	3,140
Consumer Borrower [Member] | Residential Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	1,203,641		1,203,641		1,161,135
Loans, Gross Charge-offs	100	(0)	714	3
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Real Estate, First Lien [Member]
Current Fiscal Year	44,627		44,627		49,414
Fiscal Year before Current Fiscal Year	43,359		43,359		145,036
Two Years before Current Fiscal Year	129,831		129,831		226,993
Three Years before Current Fiscal Year	213,455		213,455		251,750
Four Years before Current Fiscal Year	239,061		239,061		127,212
More than Four Years before Current Fiscal Year	224,069		224,069		120,614
Revolving	0		0		0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	894,402		894,402		921,019
Current Fiscal Year, Gross Charge-offs			0		0
Fiscal Year before Current Fiscal Year, Gross Charge-offs			0		0
Two Years before Current Fiscal Year, Gross Charge-offs			0		0
Three Years before Current Fiscal Year, Gross Charge-offs			0		0
Four Years before Current Fiscal Year, Gross Charge-offs			7		0
More than Four Years before Current Fiscal Year, Gross Charge-offs			47		0
Revolving, Gross Charge-offs			0		0
Loans, Gross Charge-offs	(0)	(0)	54	(0)	0
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Real Estate, First Lien [Member] | Performing Financial Instruments [Member]
Current Fiscal Year	44,627		44,627		49,414
Fiscal Year before Current Fiscal Year	43,359		43,359		144,460
Two Years before Current Fiscal Year	129,319		129,319		226,993
Three Years before Current Fiscal Year	213,455		213,455		251,006
Four Years before Current Fiscal Year	238,409		238,409		127,200
More than Four Years before Current Fiscal Year	222,546		222,546		118,958
Revolving	0		0		0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	891,715		891,715		918,031
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Real Estate, First Lien [Member] | Nonperforming Financial Instruments [Member]
Current Fiscal Year	0		0		0
Fiscal Year before Current Fiscal Year	0		0		576
Two Years before Current Fiscal Year	512		512		0
Three Years before Current Fiscal Year	0		0		744
Four Years before Current Fiscal Year	652		652		12
More than Four Years before Current Fiscal Year	1,523		1,523		1,656
Revolving	0		0		0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	2,687		2,687		2,988
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Construction Loans [Member]
Current Fiscal Year	14,166		14,166		19,229
Fiscal Year before Current Fiscal Year	12,335		12,335		6,449
Two Years before Current Fiscal Year	0		0		6,580
Three Years before Current Fiscal Year	4,680		4,680		1,289
Four Years before Current Fiscal Year	1,036		1,036		0
More than Four Years before Current Fiscal Year	0		0		0
Revolving	1,907		1,907		0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	34,124		34,124		33,547
Current Fiscal Year, Gross Charge-offs			0		0
Fiscal Year before Current Fiscal Year, Gross Charge-offs			0		0
Two Years before Current Fiscal Year, Gross Charge-offs			0		0
Three Years before Current Fiscal Year, Gross Charge-offs			0		0
Four Years before Current Fiscal Year, Gross Charge-offs			0		0
More than Four Years before Current Fiscal Year, Gross Charge-offs			0		0
Revolving, Gross Charge-offs			0		0
Loans, Gross Charge-offs	(0)	(0)	(0)	(0)	0
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Construction Loans [Member] | Performing Financial Instruments [Member]
Current Fiscal Year	14,166		14,166		19,229
Fiscal Year before Current Fiscal Year	12,335		12,335		6,449
Two Years before Current Fiscal Year	0		0		1,900
Three Years before Current Fiscal Year	0		0		1,289
Four Years before Current Fiscal Year	1,036		1,036		0
More than Four Years before Current Fiscal Year	0		0		0
Revolving	1,907		1,907		0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	29,444		29,444		28,867
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Construction Loans [Member] | Nonperforming Financial Instruments [Member]
Current Fiscal Year	0		0		0
Fiscal Year before Current Fiscal Year	0		0		0
Two Years before Current Fiscal Year	0		0		4,680
Three Years before Current Fiscal Year	4,680		4,680		0
Four Years before Current Fiscal Year	0		0		0
More than Four Years before Current Fiscal Year	0		0		0
Revolving	0		0		0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	4,680		4,680		4,680
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Home Equity Loan [Member]
Current Fiscal Year	543		543		3,290
Fiscal Year before Current Fiscal Year	2,359		2,359		5,593
Two Years before Current Fiscal Year	4,255		4,255		6,217
Three Years before Current Fiscal Year	6,901		6,901		1,622
Four Years before Current Fiscal Year	967		967		939
More than Four Years before Current Fiscal Year	5,230		5,230		2,791
Revolving	214,426		214,426		142,057
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	234,681		234,681		162,509
Current Fiscal Year, Gross Charge-offs			0		0
Fiscal Year before Current Fiscal Year, Gross Charge-offs			100		0
Two Years before Current Fiscal Year, Gross Charge-offs			10		0
Three Years before Current Fiscal Year, Gross Charge-offs			250		0
Four Years before Current Fiscal Year, Gross Charge-offs			0		0
More than Four Years before Current Fiscal Year, Gross Charge-offs			0		19
Revolving, Gross Charge-offs			0		0
Loans, Gross Charge-offs	100	(0)	360	(0)	19
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Home Equity Loan [Member] | Performing Financial Instruments [Member]
Current Fiscal Year	543		543		3,290
Fiscal Year before Current Fiscal Year	2,359		2,359		5,558
Two Years before Current Fiscal Year	4,230		4,230		6,217
Three Years before Current Fiscal Year	5,749		5,749		1,622
Four Years before Current Fiscal Year	967		967		939
More than Four Years before Current Fiscal Year	5,194		5,194		2,717
Revolving	214,426		214,426		140,707
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	233,468		233,468		161,050
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Home Equity Loan [Member] | Nonperforming Financial Instruments [Member]
Current Fiscal Year	0		0		0
Fiscal Year before Current Fiscal Year	0		0		35
Two Years before Current Fiscal Year	25		25		0
Three Years before Current Fiscal Year	1,152		1,152		0
Four Years before Current Fiscal Year	0		0		0
More than Four Years before Current Fiscal Year	36		36		74
Revolving	0		0		1,350
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	1,213		1,213		1,459
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Real Estate, Junior Lien [Member]
Current Fiscal Year	4,045		4,045		9,537
Fiscal Year before Current Fiscal Year	7,765		7,765		11,557
Two Years before Current Fiscal Year	10,267		10,267		9,853
Three Years before Current Fiscal Year	7,752		7,752		5,098
Four Years before Current Fiscal Year	4,464		4,464		2,760
More than Four Years before Current Fiscal Year	6,091		6,091		5,205
Revolving	50		50		50
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	40,434		40,434		44,060
Current Fiscal Year, Gross Charge-offs			0		0
Fiscal Year before Current Fiscal Year, Gross Charge-offs			0		0
Two Years before Current Fiscal Year, Gross Charge-offs			0		0
Three Years before Current Fiscal Year, Gross Charge-offs			300		0
Four Years before Current Fiscal Year, Gross Charge-offs			0		0
More than Four Years before Current Fiscal Year, Gross Charge-offs			0		638
Revolving, Gross Charge-offs			0		0
Loans, Gross Charge-offs	(0)	(0)	300	3	638
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Real Estate, Junior Lien [Member] | Performing Financial Instruments [Member]
Current Fiscal Year	4,045		4,045		7,762
Fiscal Year before Current Fiscal Year	5,990		5,990		11,557
Two Years before Current Fiscal Year	10,267		10,267		9,553
Three Years before Current Fiscal Year	7,752		7,752		4,990
Four Years before Current Fiscal Year	4,464		4,464		2,760
More than Four Years before Current Fiscal Year	5,476		5,476		4,178
Revolving	50		50		50
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	38,044		38,044		40,850
Consumer Borrower [Member] | Residential Portfolio Segment [Member] | Real Estate, Junior Lien [Member] | Nonperforming Financial Instruments [Member]
Current Fiscal Year	0		0		1,775
Fiscal Year before Current Fiscal Year	1,775		1,775		0
Two Years before Current Fiscal Year	0		0		300
Three Years before Current Fiscal Year	0		0		108
Four Years before Current Fiscal Year	0		0		0
More than Four Years before Current Fiscal Year	615		615		1,027
Revolving	0		0		0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	2,390		2,390		3,210
Consumer Borrower [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	1,245,355		1,245,355		1,205,257
Consumer Borrower [Member] | Consumer Portfolio Segment [Member] | Consumer, Other [Member]
Current Fiscal Year	4,668		4,668		9,618
Fiscal Year before Current Fiscal Year	3,216		3,216		4,706
Two Years before Current Fiscal Year	3,071		3,071		5,125
Three Years before Current Fiscal Year	3,456		3,456		502
Four Years before Current Fiscal Year	228		228		2,548
More than Four Years before Current Fiscal Year	4,124		4,124		4,118
Revolving	22,951		22,951		17,505
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	41,714		41,714		44,122
Current Fiscal Year, Gross Charge-offs			0		0
Fiscal Year before Current Fiscal Year, Gross Charge-offs			9		8
Two Years before Current Fiscal Year, Gross Charge-offs			31		3
Three Years before Current Fiscal Year, Gross Charge-offs			22		150
Four Years before Current Fiscal Year, Gross Charge-offs			0		4
More than Four Years before Current Fiscal Year, Gross Charge-offs			50		21
Revolving, Gross Charge-offs			0		0
Loans, Gross Charge-offs	34	$ 161	112	$ 174	186
Consumer Borrower [Member] | Consumer Portfolio Segment [Member] | Consumer, Other [Member] | Performing Financial Instruments [Member]
Current Fiscal Year	4,668		4,668		9,618
Fiscal Year before Current Fiscal Year	3,212		3,212		4,695
Two Years before Current Fiscal Year	3,071		3,071		4,853
Three Years before Current Fiscal Year	3,456		3,456		502
Four Years before Current Fiscal Year	228		228		2,541
More than Four Years before Current Fiscal Year	4,071		4,071		4,069
Revolving	22,951		22,951		17,505
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	41,657		41,657		43,783
Consumer Borrower [Member] | Consumer Portfolio Segment [Member] | Consumer, Other [Member] | Nonperforming Financial Instruments [Member]
Current Fiscal Year	0		0		0
Fiscal Year before Current Fiscal Year	4		4		11
Two Years before Current Fiscal Year	0		0		272
Three Years before Current Fiscal Year	0		0		0
Four Years before Current Fiscal Year	0		0		7
More than Four Years before Current Fiscal Year	53		53		49
Revolving	0		0		0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss	$ 57		$ 57		$ 339

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