Note 3 - Money Market Investments (Tables)

12 Months Ended

Dec. 31, 2012

Schedule of Money Market Investments [Table Text Block]

Years Ended December 31,			2012				2011				2010
Interest-bearing deposits with other banks
At December 31   —Balance	$		112,886		$		126,448		$		40,503
—Weighted average interest rate			0.25%				0.25%				0.25%
—Weighted average original maturity (Days)			3				3				7
During the year    —Maximum month-end balance			174,808				262,940				66,858
—Daily average balance			58,836				93,561				31,960
—Weighted average interest rate earned			0.23%				0.24%				0.23%
—Range of interest rates earned		0.03	–	0.80%		0.03	–	0.90%		0.06	–	1.50%