Note 7 - Premises, Furniture, and Equipment (Detail) - Depreciation Expense (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Depreciation expense on premises, furniture, and equipment	$ 10,995	$ 10,995	$ 11,397	$ 10,917