Note 9 - Share Repurchase Program (Details Textual) - USD ($) $ in Millions	9 Months Ended
Sep. 30, 2015	Mar. 31, 2015	Nov. 30, 2013
Share Repurchase Program [Member]
Treasury Stock, Shares, Acquired	406,234
Treasury Stock, Value, Acquired, Cost Method	$ 14.7
Stock Repurchase Program, Authorized Amount	75.0	$ 75.0	$ 35.0
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 30.6

Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 30

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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