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Note 3 - Investment Securities Available for Sale (Tables)

9 Months Ended

Sep. 30, 2014

Investments, Debt and Equity Securities [Abstract]

Schedule of Available-for-sale Securities Reconciliation [Table Text Block]

	September 30, 2014									December 31, 2013
	Amortized		Unrealized					Fair		Amortized		Unrealized					Fair
	Cost		Gains		Losses			Value		Cost		Gains		Losses			Value
Agency RMBS:
Agency ARMs
Freddie Mac	$	60,536	$	60	$	(1,019	)	$	59,577	$	67,121	$	37	$	(2,101	)	$	65,057
Fannie Mae		117,082		41		(1,948	)		115,175		130,487		58		(3,128	)		127,417
Ginnie Mae		13,571		—		(202	)		13,369		17,049		—		(201	)		16,848
Total Agency ARMs		191,189		101		(3,169	)		188,121		214,657		95		(5,430	)		209,322

Agency Fixed Rate
Freddie Mac		39,140		—		(1,018	)		38,122		43,920		—		(1,714	)		42,206
Fannie Mae		467,546		—		(15,177	)		452,369		518,598		—		(24,861	)		493,737
Total Agency Fixed Rate		506,686		—		(16,195	)		490,491		562,518		—		(26,575	)		535,943

Agency IOs ⁽¹⁾
Freddie Mac		40,922		254		(5,168	)		36,008		43,468		252		(5,187	)		38,533
Fannie Mae		56,402		1,152		(4,462	)		53,092		60,813		1,300		(5,007	)		57,106
Ginnie Mae		45,071		332		(3,978	)		41,425		37,660		706		(2,396	)		35,970
Total Agency IOs		142,395		1,738		(13,608	)		130,525		141,941		2,258		(12,590	)		131,609

Total Agency RMBS		840,270		1,839		(32,972	)		809,137		919,116		2,353		(44,595	)		876,874
Non-Agency RMBS		2,145		62		(167	)		2,040		2,413		136		(188	)		2,361
CMBS		28,787		17,166		—			45,953		—		—		—			—
CLOs		21,866		13,255		—			35,121		18,478		14,730		—			33,208
Total investment securities available for sale	$	893,068	$	32,322	$	(33,139	)	$	892,251	$	940,007	$	17,219	$	(44,783	)	$	912,443

CMBS ⁽²⁾	$	25,627	$	12,752	$	—		$	38,379	$	74,314	$	18,264	$	—		$	92,578
Total investment securities available for sale held in securitization trusts	$	25,627	$	12,752	$	—		$	38,379	$	74,314	$	18,264	$	—		$	92,578

	⁽¹⁾	Included in investment securities available for sale are Agency IOs. Agency IOs are measured at fair value through earnings.
	⁽²⁾	CMBS investments have contractual maturities ranging from 0 to 10 years.

Available-for-sale Securities [Table Text Block]

Weighted Average Life	September 30, 2014		December 31, 2013
Less than 5 years	$	557,575	$	281,068
5 to 10 years		240,276		451,635
Greater than 10 years		94,400		179,740
Total	$	892,251	$	912,443

Investments Classified by Contractual Maturity Date [Table Text Block]

	September 30, 2014								December 31, 2013
	Less than 6 months		6 to 24 months		More than 24 months		Total		Less than 6 months		6 to 24 months		More than 24 months		Total
Agency RMBS	$	101,139	$	17,533	$	690,465	$	809,137	$	97,385	$	14,823	$	764,666	$	876,874
Non-Agency RMBS		2,040		—		—		2,040		2,361		—		—		2,361
CMBS		—		—		45,953		45,953		—		—		—		—
CLOs		35,121		—		—		35,121		33,208		—		—		33,208
Total investment securities available for sale	$	138,300	$	17,533	$	736,418	$	892,251	$	132,954	$	14,823	$	764,666	$	912,443

CMBS	$	—	$	—	$	38,379	$	38,379	$	28,232	$	—	$	64,346	$	92,578
Total investment securities available for sale held in securitization trusts	$	—	$	—	$	38,379	$	38,379	$	28,232	$	—	$	64,346	$	92,578

Unrealized Gain (Loss) on Investments [Table Text Block]

September 30, 2014	Less than 12 Months					Greater than 12 months					Total
	Carrying Value		Gross Unrealized Losses			Carrying Value		Gross Unrealized Losses			Carrying Value		Gross Unrealized Losses
Agency RMBS	$	7,179	$	(59	)	$	660,835	$	(19,305	)	$	668,014	$	(19,364	)
Non-Agency RMBS		—		—			1,017		(167	)		1,017		(167	)
Total investment securities available for sale	$	7,179	$	(59	)	$	661,852	$	(19,472	)	$	669,031	$	(19,531	)

December 31, 2013	Less than 12 Months					Greater than 12 months					Total
	Carrying Value		Gross Unrealized Losses			Carrying Value		Gross Unrealized Losses			Carrying Value		Gross Unrealized Losses
Agency RMBS	$	332,519	$	(11,423	)	$	398,325	$	(20,582	)	$	730,844	$	(32,005	)
Non-Agency RMBS		—		—			1,104		(188	)		1,104		(188	)
Total investment securities available for sale	$	332,519	$	(11,423	)	$	399,429	$	(20,770	)	$	731,948	$	(32,193	)

- Definition

Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

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