Note 13 - Fair Value of Financial Instruments (Details) - Losses Incurred for Assets Measured at Fair Value (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Residential Mortgage Loans Held In Securitization Trusts - Impaired Loans [Member]
Note 13 - Fair Value of Financial Instruments (Details) - Losses Incurred for Assets Measured at Fair Value [Line Items]
Gain (loss) for assets measured at fair value on a non-recurring basis	$ (287)	$ (39)	$ (654)	$ (568)
Real Estate Owned Held in Residential Securitization Trusts [Member]
Note 13 - Fair Value of Financial Instruments (Details) - Losses Incurred for Assets Measured at Fair Value [Line Items]
Gain (loss) for assets measured at fair value on a non-recurring basis	$ (50)	$ (199)	$ (103)	$ (209)

This item represents the estimated amount of gains or losses included in earnings during the period attributable to changes in instrument-specific credit risk arising from loans and other receivables held as assets.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 30

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612

Name:	us-gaap_FairValueOptionCreditRiskGainsLossesOnAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration