Note 12 - Stock Incentive and Employee Benefit Plans (Details) - Compensation Expense (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 8,469	$ 9,015	$ 7,151
Stock Options and Stock Appreciation Rights [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	3,618	3,875	4,523
Unrestricted Stock Grants [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	480	400	488
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	1,842	1,073	378
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 2,529	$ 3,667	$ 1,762