Note 11 - Fair Value (Detail) - Fair Value Measurements Recorded for Assets Measured at Fair Value on a Non-Recurring Basis (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Charged to Allowance for Loan and Covered Loan Losses [Member]
Collateral-dependent impaired loans	$ 6,782	$ 18,740
Loans held-for-sale		3,135
Charged to Earnings [Member]
OREO	$ 567	$ 690