Note 8 - Deposits and Borrowed Funds - Short-term Borrowed Funds (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Collateral Carrying Value	$ 227,020	$ 227,862
Short-term borrowed funds	73,611	59,078
US Government-sponsored Enterprises Debt Securities [Member]
Collateral Carrying Value	74,205	74,031
Agency Residential MBS [Member]
Collateral Carrying Value	62,217	63,277
Corporate Debt Securities [Member]
Collateral Carrying Value	$ 90,598	$ 90,554

Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(19)(a))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(13))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16)(a)(1))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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Balance Type:	credit
Period Type:	instant