Note 10 - Fair Value of Financial Instruments (Detail) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Financial Assets At Fair Value Option	$ 47,900,000		$ 54,500,000
Financial Liabilities At Fair Value Option	24,700,000		23,900,000
Financial Assets At Fair Value Option, Amount Sold	4,400,000
Fair Value, Option, Changes in Fair Value, Gain (Loss)	(123,000)	(448,000)
Financial Liabilites At Fair Value Option, Contractual Principal	61,900,000		61,900,000
Financial Liabilities At Fair Value Option, Accrued Interest Payable	400,000		400,000
NonaccruingCollateral Dependent Loans Percent Of The Appraised Or Internally Estimated Value Of The Property [Member]
Fair Value Inputs, Discount Rate	85.00%
Impaired Collateral Dependent Loans Percent Of The Appraised Or Internally Estimated Value Of The Underlying Property [Member]
Fair Value Inputs, Discount Rate	85.00%
Interest Rate Caps / Swaps [Member]
Fair Value, Option, Changes in Fair Value, Gain (Loss)	$ 800,000	$ (800,000)