Note 16 - Share-Based Compensation (Detail) - Effect of Recording Share-Based Compensation Expense (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Stock option expense	$ 291		$ 317		$ 785
Restricted stock/unit award expense	5,607		4,712		2,731
Salary stock award expense	464		609
Total share-based compensation expense	6,362		5,638		3,516
Income tax benefit	2,602		2,199		1,371
Share-based compensation expense, net of tax	3,760		3,439		2,145
Basic earnings per common share (in Dollars per share)	$ 0.05		$ 0.05		$ 0.04
Diluted earnings per common share (in Dollars per share)	$ 0.05		$ 0.05		$ 0.04
Operating Activities [Member]
Cash Flow Effect	(47)		189		177
Financing Activities [Member]
Cash Flow Effect	$ 47	[1]	$ (189)	[1]	$ (177)	[1]

[1] Amount represents cash flows resulting from the tax benefits of tax deductions in excess of recognized compensation expense.