Note 11 - Derivative Financial Instruments (Details) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Note 11 - Derivative Financial Instruments (Details) [Line Items]
Junior Subordinated Notes, Portion Exposed To Rising Interest Rates	$ 18,000,000
Junior Subordinated Notes, Contractual Value	61,900,000
Derivative Asset, Notional Amount	122,259,000	122,300,000
Not Designated as Hedging Instrument [Member]
Note 11 - Derivative Financial Instruments (Details) [Line Items]
Derivative Asset, Notional Amount	118,000,000
Designated as Hedging Instrument [Member]
Note 11 - Derivative Financial Instruments (Details) [Line Items]
Derivative Asset, Notional Amount	$ 4,300,000

Nominal or face amount used to calculate payments on the derivative asset.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 1B

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5580258-113959

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 1A

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5579245-113959

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Notional Amount

-URI http://asc.fasb.org/extlink&oid=6519104

Name:	us-gaap_DerivativeAssetNotionalAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant