Note 4 - Other Real Estate Owned (Detail) - OREO Activity (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Beginning balance	$ 38,157
Proceeds from sales	(15,636)	(13,029)
Loss on sales	(324)	(516)
Write downs and other decreases, net	(3,760)	(5,429)
Ending balance	52,562	38,157
Beginning [Member]
Ending balance		38,157	30,545
Ending [Member]
Ending balance	52,562	38,157
From Loans [Member]
Transfers to OREO	33,913	26,586	17,771
From Premises [Member]
Transfers to OREO	$ 212