Note 12 - Income Taxes (Details) - Deferred Tax Assets and Liabilities - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred Tax Assets
Loan loss allowance, due to differences in computation of bad debts	$ 59,639	$ 66,999
Share-based compensation	7,513	12,808
Accrual for bonuses	4,984	4,585
Non-accrual interest	4,929	3,735
Accrual for litigation	3,209	2,918
Write-down on equity securities and venture capital investments	3,981	2,697
Write-down on other real estate owned	384	1,357
Depreciation and amortization	2,917
State tax	4,802	3,253
Unrealized loss on interest rate swaps	2,173	1,739
Unrealized loss on securities available-for-sale, net	3,940	2,301
Other, net	1,743	2,179
Gross deferred tax assets	100,214	104,571
Deferred Tax Liabilities
Investment in affordable housing partnerships	(1,444)	(703)
Basis difference in acquired assets	(4,947)	(3,321)
Dividends on Federal Home Loan Bank common stock	(1,322)	(1,927)
Other, net	(1,937)	(2,372)
Gross deferred tax liabilities	(9,650)	(8,323)
Net deferred tax assets	$ 90,564	$ 96,248