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Note 11 - Cash Surrender Value of Bank-owned Life Insurance (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Bank Owned Life Insurance Income			$ 439,000
Life Insurance, Corporate or Bank Owned, Change in Value			(22,464,000)
Life Insurance Policies, Charges			892,000
Non-interest Income [Member]
Life Insurance Policies, Charges			455,000
Non-interest Expense [Member]
Life Insurance Policies, Charges			437,000
Provision for Income Taxes [Member]
Life Insurance Policies, Charges			$ 1,700,000

X

- Definition

Charges made to income that originate from liquidation of life insurance policies held by the bank.

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	duration

X

- Definition

Earnings on or other increases in the value of the cash surrender value of bank owned life insurance policies.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.13)
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

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X

- Definition

The change in cash surrender or contract value during the period which adjusted the amount of premiums paid in determining the expense or income recognized under the contract for the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 325
-SubTopic 30
-Section 35
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6384439&loc=d3e42048-111605

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