Note 12 - Stock Incentive and Employee Benefit Plans (Details) - Unrecognized Compensation Expense (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Note 12 - Stock Incentive and Employee Benefit Plans (Details) - Unrecognized Compensation Expense [Line Items]
Unrecognized Expense	$ 14,134	$ 15,053	$ 10,681
Weighted Average Period	2 years	1 year 328 days	2 years
Stock Options and Stock Appreciation Rights [Member]
Note 12 - Stock Incentive and Employee Benefit Plans (Details) - Unrecognized Compensation Expense [Line Items]
Unrecognized Expense	6,777	5,260	4,395
Weighted Average Period	2 years 36 days	1 year 328 days	1 year 255 days
Restricted Stock [Member]
Note 12 - Stock Incentive and Employee Benefit Plans (Details) - Unrecognized Compensation Expense [Line Items]
Unrecognized Expense	4,090	2,473	1,098
Weighted Average Period	2 years 36 days	2 years	2 years 73 days
Performance Shares [Member]
Note 12 - Stock Incentive and Employee Benefit Plans (Details) - Unrecognized Compensation Expense [Line Items]
Unrecognized Expense	$ 3,267	$ 7,320	$ 5,188
Weighted Average Period	1 year 255 days	1 year 292 days	2 years 73 days