Note 6 - Past Due Loans, Allowance For Credit Losses, and Impaired Loans (Detail) (USD $)	3 Months Ended					3 Months Ended
	Sep. 30, 2012	Sep. 30, 2012 Non-Performing and Performing Potential Problem Loans [Member]	Sep. 30, 2012 Covered Open-End Consumer Loans Not Categorized as Purchased Impaired Loans [Member]	Sep. 30, 2012 Troubled Debt Restructurings [Member]	Dec. 31, 2011 Troubled Debt Restructurings [Member]	Sep. 30, 2012 Resolved Through Foreclosure or Transferred to Non-Accrual [Member]	Sep. 30, 2012 Covered Purchased Impaired Loans [Member]	Sep. 30, 2012 Covered Open-End Consumer Loans [Member]	Sep. 30, 2011 Covered Open-End Consumer Loans [Member]
Loans With Accelerated Credit Remediation Actions	$ 223,400,000
Loans With Accelerated Credit Remediation Actions Write Downs Charged to Allowance for Loan Loss		99,100,000
Loans With Modified Disposition Strategies						52,400,000
Loans and Leases Receivable, Allowance, Covered			989,000				8,400,000	966,000	1,000,000
Valuation Allowance on Troubled Debt Restructured Loans				$ 3,000,000	$ 94,000