The fair value as of the balance sheet date of firm holdings in mortgages, mortgage backed securities (investment instruments that represent ownership of an undivided interest in a group of mortgages, where principal and interest from the individual mortgages are used to pay investors' principal and interest on the mortgage backed security) and asset-backed securities that are primarily paid from the cash flows of a discrete pool of receivables or other financial assets (such as credit-card receivables), either fixed or revolving, that by their terms convert into cash within a finite time period. Includes both pledged (to counterparties as collateral for financing transactions) and unpledged holdings.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 940

-SubTopic 320

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=35711157&loc=d3e42546-110969

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Note 13 - Fair Value of Financial Instruments (Details) (USD $) In Thousands, unless otherwise specified								9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014 CMBS [Member]	Sep. 30, 2014 Distressed Residential Mortgage Loans [Member] Other Assets [Member]	Dec. 31, 2013 Distressed Residential Mortgage Loans [Member] Other Assets [Member]	Sep. 30, 2014 Distressed Residential Mortgage Loans [Member]	Dec. 31, 2013 Distressed Residential Mortgage Loans [Member]	Sep. 30, 2014 Collateralized Mortgage Backed Securities Held In Securitization Trusts [Member] Minimum [Member]	Sep. 30, 2014 Collateralized Mortgage Backed Securities Held In Securitization Trusts [Member] Maximum [Member]	Sep. 30, 2014 Multi-Family Loans Held in Securitization Trusts [Member] Minimum [Member]	Sep. 30, 2014 Multi-Family Loans Held in Securitization Trusts [Member] Maximum [Member]
Note 13 - Fair Value of Financial Instruments (Details) [Line Items]
Fair Value Inputs, Discount Rate								4.10%	11.80%	3.13%	5.80%
Financial Instruments, Owned, Mortgages, Mortgage-backed and Asset-backed Securities, at Fair Value	$ 152,902	$ 163,237		$ 15,800	$ 9,700	$ 247,200	$ 254,700
Investment securities, available for sale, at fair value (including pledged securities of $683,914 and $853,223, respectively)	$ 892,251	$ 912,443	$ 45,953