Note 4 - Loans and Allowance for Credit Losses (Details) - Changes in the Carrying Amount of Impaired Purchased Loans (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Changes in the Carrying Amount of Impaired Purchased Loans [Abstract]
Carrying amount at the beginning of the period	$ 4,936	$ 14,629
Reductions during the period	(19)	(9,693)
Carrying amount at the end of the period	$ 4,917	$ 4,936