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Note 3 - Loans and Allowance for Loan Losses - Acquired Portfolio and the Acquisition Fair Value Adjustments (Details) - County Bank Corp ("County") [Member] - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2020	Mar. 31, 2020
Loans acquired - contractual payments	$ 395,123
Nonaccretable difference	(2,928)
Expected cash flows	392,195
Accretable yield	(1,841)
Carrying balance at acquisition date	390,354
Balance	(1,716)	$ (1,766)
Accretion	56	50
Balance	(1,660)	(1,716)
Acquired Impaired [Member]
Loans acquired - contractual payments	7,729
Nonaccretable difference	(2,928)
Expected cash flows	4,801
Accretable yield	(185)
Carrying balance at acquisition date	4,616
Balance	(185)	(185)
Accretion	45	0
Balance	(140)	(185)
Acquired Non-Impaired [Member]
Loans acquired - contractual payments	387,394
Nonaccretable difference	0
Expected cash flows	387,394
Accretable yield	(1,656)
Carrying balance at acquisition date	385,738
Balance	(1,531)	(1,581)
Accretion	11	50
Balance	$ (1,520)	$ (1,531)

X

- Definition

The aggregate excess of a loan's cash flows expected to be collected over the investor's initial investment in the loan. This relates to loans with deteriorating of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.

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The amount of the loan's contractually required payments receivable in excess of the amount of its cash flows expected to be collected. This relates to loans with deteriorating of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.

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- Definition

Amount of the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 15
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=121585399&loc=d3e13503-111538

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Amount of accretion recognized for the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities, with evidence of deterioration of credit quality.

+ References

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Amount of cash flows expected to be collected at acquisition of acquired loans not accounted for as debt securities with evidence of deterioration of credit quality.

+ References

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-Publisher FASB
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Amount of contractually required payments receivable at acquisition of acquired loans not accounted for as debt securities with evidence of deterioration of credit quality.

+ References

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The recorded balance, net of any applicable reductions (for example, unamortized accretable yield and allowance for loan losses). This relates to loans not accounted for debt securities with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.

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