Note 12 - Fair Value Measurements (Detail) (USD $) In Thousands, unless otherwise specified									12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2012 Purchased Covered Loans [Member]	Dec. 31, 2011 Purchased Covered Loans [Member]	Dec. 31, 2012 Purchased Non-Covered Loans [Member]	Dec. 31, 2011 Purchased Non-Covered Loans [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 2 [Member]
Fair Value Inputs, Discount Rate									10.00%
Loans and Leases Receivable, Allowance	$ 30,234	$ 32,597	$ 35,636	$ 41,043	$ 1,005
Fair Value Discount, Credit Default Risk, Purchased Loans					$ 26,128	$ 46,282	$ 5,226	$ 10,211