Note 6 - Other Real Estate Owned (Detail) - Other Real Estate Owned Expense (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Operating expense	$ 4,817	$ 5,441	$ 5,849
Provision for losses	10,668	10,385	20,139
Net gain on transfer and disposal	(369)	(5,243)	(9,977)
Total other real estate owned expense	$ 15,116	$ 10,583	$ 16,011