Note 10 - Fair Value of Financial Instruments (Details) - Financial assets and liabilities reported under the fair value option: (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012		Dec. 31, 2012
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value Measurements	$ 44,800				$ 44,800				$ 54,500
Changes in Fair Values For Items Measured at Fair Value Pursuant to Election of the Fair Value Option	(308)		(562)		(431)		(1,010)
Borrowed funds	26,200				26,200				23,900
Borrowed funds	(308)		(562)		(431)		(1,010)
Net gain (loss) from fair value adjustments (1) (2)	(308)		(562)		(431)		(1,010)
Collateralized Mortgage Backed Securities [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value Measurements	15,040				15,040				24,911
Changes in Fair Values For Items Measured at Fair Value Pursuant to Election of the Fair Value Option	(169)		(143)		(531)		(161)
Borrowed funds	(169)		(143)		(531)		(161)
Net gain (loss) from fair value adjustments (1) (2)	(169)		(143)		(531)		(161)
Other securities [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value Measurements	29,792				29,792				29,577
Changes in Fair Values For Items Measured at Fair Value Pursuant to Election of the Fair Value Option	(220)		5		53		246
Borrowed funds	(220)		5		53		246
Net gain (loss) from fair value adjustments (1) (2)	(220)		5		53		246
Borrowed funds [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Changes in Fair Values For Items Measured at Fair Value Pursuant to Election of the Fair Value Option	(1,456)		1,734		(2,275)		1,905
Borrowed funds	26,192				26,192				23,922
Borrowed funds	(1,456)		1,734		(2,275)		1,905
Net gain (loss) from fair value adjustments (1) (2)	(1,456)		1,734		(2,275)		1,905
Financial Assets And Liabilities, Excluding Interest Rate Caps / Swaps [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Changes in Fair Values For Items Measured at Fair Value Pursuant to Election of the Fair Value Option	(1,845)	[1],[2]	1,596	[1],[2]	(2,753)	[1],[2]	1,990	[1],[2]
Borrowed funds	(1,845)	[1],[2]	1,596	[1],[2]	(2,753)	[1],[2]	1,990	[1],[2]
Net gain (loss) from fair value adjustments (1) (2)	$ (1,845)	[1],[2]	$ 1,596	[1],[2]	$ (2,753)	[1],[2]	$ 1,990	[1],[2]

[1] The net gain (loss) from fair value adjustments presented in the above table does not include net gains of $1.5 million and net losses of $2.2 million for the three months ended June 30, 2013 and 2012, respectively, from the change in the fair value of interest rate caps/swaps.

[2] The net gain (loss) from fair value adjustments presented in the above table does not include net gains of $2.3 million and net losses of $3.0 million for the six months ended June 30, 2013 and 2012, respectively, from the change in the fair value of interest rate caps/swaps.