Note 12 - Income Taxes (Detail) - Deferred Tax Assets and Liabilities (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Deferred Tax Assets
Loan loss allowance, due to differences in computation of bad debts	$ 100,774	$ 109,686
Write-down on equity securities	3,374	3,609
Stock option compensation expense	16,120	16,048
State tax	4,479	3,744
Non-accrual interest	3,208	2,048
Write-down on other real estate owned	10,302	14,148
Accural for litigation	2,415
Unrealized loss on interest rate swaps		1,097
Unrealized loss on securities available-for-sale, net		6,311
Other, net	3,544	3,536
Gross deferred tax assets	144,216	160,227
Deferred Tax Liabilities
Core deposit intangibles	(1,632)	(3,919)
Investment in aircraft financing trust and venture capital partnerships	(19,684)	(21,628)
Unrealized gain on securities available-for-sale, net	(338)
Dividends on Federal Home Loan Bank common stock	(3,071)	(2,788)
Other, net	(5,084)	(5,646)
Gross deferred tax liabilities	(29,809)	(33,981)
Valuation allowance	(2,125)	(2,533)
Net deferred tax assets	$ 112,282	$ 123,713