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Note 4 - Loans Receivables and Allowance for Loan and Lease Losses - Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Impaired loans, recorded investment	$ 24,200
With no allowance recorded, average recorded investment	10,789	$ 14,016
With no allowance recorded, interest income recognized	48	65
With allowance recorded, average recorded investment	13,104	9,512
With allowance recorded, interest income recognized	49	31
Impaired Loans, Average recorded investment	23,893	23,528
Impaired Loans, interest income recognized	97	96
Business Activities Loans [Member]
Impaired loans with no related allowance recorded, recorded investment	10,754		$ 10,820
Impaired loans with no related allowance recorded, unpaid principal balance	11,787		11,820
Impaired loans with a related allowance recorded, recorded investment	13,415		12,982
Impaired loans with a related allowance recorded, unpaid principal balance	14,084		13,416
Impaired loans, related allowance	2,715		2,299
Impaired loans, recorded investment	24,169		23,802
Impaired loans, unpaid principal balance	25,871		25,236
Commercial Real Estate Portfolio Segment [Member]
With no allowance recorded, average recorded investment	6,806	6,078
With no allowance recorded, interest income recognized	32	0
With allowance recorded, average recorded investment	8,873	8,813
With allowance recorded, interest income recognized	25	0
Impaired Loans, Average recorded investment	15,679	14,891
Impaired Loans, interest income recognized	57	0
Commercial Real Estate Portfolio Segment [Member] | Business Activities Loans [Member]
Impaired loans with no related allowance recorded, recorded investment	6,787		6,820
Impaired loans with no related allowance recorded, unpaid principal balance	7,765		7,776
Impaired loans with a related allowance recorded, recorded investment	8,856		8,884
Impaired loans with a related allowance recorded, unpaid principal balance	8,805		8,811
Impaired loans, related allowance	1,752		1,567
Impaired loans, recorded investment	15,643		15,704
Impaired loans, unpaid principal balance	16,570		16,587
Residential Portfolio Segment [Member]
With no allowance recorded, average recorded investment	2,840	4,248
With no allowance recorded, interest income recognized	8	13
With allowance recorded, average recorded investment	1,328	190
With allowance recorded, interest income recognized	21	3
Impaired Loans, Average recorded investment	4,168	4,438
Impaired Loans, interest income recognized	29	16
Residential Portfolio Segment [Member] | Business Activities Loans [Member]
Impaired loans with no related allowance recorded, recorded investment	2,834		2,847
Impaired loans with no related allowance recorded, unpaid principal balance	2,758		2,763
Impaired loans with a related allowance recorded, recorded investment	3,932		461
Impaired loans with a related allowance recorded, unpaid principal balance	4,592		488
Impaired loans, related allowance	954		8
Impaired loans, recorded investment	6,766		3,308
Impaired loans, unpaid principal balance	7,350		3,251
Commercial Portfolio Segment [Member]
With no allowance recorded, average recorded investment	621	2,745
With no allowance recorded, interest income recognized	4	46
With allowance recorded, average recorded investment	2,738	462
With allowance recorded, interest income recognized	2	26
Impaired Loans, Average recorded investment	3,359	3,207
Impaired Loans, interest income recognized	6	72
Commercial Portfolio Segment [Member] | Business Activities Loans [Member]
Impaired loans with no related allowance recorded, recorded investment	612		630
Impaired loans with no related allowance recorded, unpaid principal balance	743		758
Impaired loans with a related allowance recorded, recorded investment	460		3,471
Impaired loans with a related allowance recorded, unpaid principal balance	486		3,916
Impaired loans, related allowance	7		723
Impaired loans, recorded investment	1,072		4,101
Impaired loans, unpaid principal balance	1,229		4,674
Consumer Portfolio Segment [Member]
With no allowance recorded, average recorded investment	522	945
With no allowance recorded, interest income recognized	4	6
With allowance recorded, average recorded investment	165	47
With allowance recorded, interest income recognized	1	2
Impaired Loans, Average recorded investment	687	992
Impaired Loans, interest income recognized	5	$ 8
Consumer Portfolio Segment [Member] | Business Activities Loans [Member]
Impaired loans with no related allowance recorded, recorded investment	521		523
Impaired loans with no related allowance recorded, unpaid principal balance	521		523
Impaired loans with a related allowance recorded, recorded investment	167		166
Impaired loans with a related allowance recorded, unpaid principal balance	201		201
Impaired loans, related allowance	2		1
Impaired loans, recorded investment	688		689
Impaired loans, unpaid principal balance	$ 722		$ 724

X

- Definition

Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

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