Note 14 - Stock Incentive and Employee Benefit Plans (Details) - Unrecognized Compensation Expense - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Note 14 - Stock Incentive and Employee Benefit Plans (Details) - Unrecognized Compensation Expense [Line Items]
Unrecognized expense	$ 18,183	$ 14,134	$ 15,053
Weighted average period	2 years	2 years	1 year 328 days
Stock Options and Stock Appreciation Rights [Member]
Note 14 - Stock Incentive and Employee Benefit Plans (Details) - Unrecognized Compensation Expense [Line Items]
Unrecognized expense	$ 7,216	$ 6,777	$ 5,260
Weighted average period	2 years 36 days	2 years 36 days	1 year 328 days
Unrestricted Stock Grants [Member]
Note 14 - Stock Incentive and Employee Benefit Plans (Details) - Unrecognized Compensation Expense [Line Items]
Unrecognized expense	$ 5,850	$ 4,090	$ 2,473
Weighted average period	2 years 36 days	2 years 36 days	2 years
Performance Shares [Member]
Note 14 - Stock Incentive and Employee Benefit Plans (Details) - Unrecognized Compensation Expense [Line Items]
Unrecognized expense	$ 5,117	$ 3,267	$ 7,320
Weighted average period	2 years	1 year 255 days	1 year 292 days