Note 8 - Deposits (Detail) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Interest-bearing Domestic Deposit, Brokered	$ 522,100,000	$ 444,800,000
Deposits	3,015,193,000	3,146,245,000
Excludes Brokered Deposits Issued In $1,000 Amounts Under A Master Certificate Of Deposit [Member]
Time Deposits, $100,000 or More	393,700,000	565,700,000
Securities Pledged as Collateral [Member]
Deposit Liabilities, Collateral Issued, Financial Instruments	439,500,000	358,000,000
Letter of Credit Pledged as Collateral [Member]
Deposit Liabilities, Collateral Issued, Financial Instruments	414,600,000	392,300,000
Government Deposits [Member]
Deposits	$ 697,000,000	$ 591,000,000