Note 3 - Earnings Per Share (Details) - Earnings Per Share (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Basic EPS:
Net income from continuing operations (in Dollars)	$ 20,329	$ 11,859	$ 32,071	$ 26,726
Assumed conversions of Senior Notes (in Dollars)	1,253	1,251	2,514	2,501
Adjusted income from continuing operations (in Dollars)	$ 21,582	$ 13,110	$ 34,585	$ 29,227
Weighted average number of common shares outstanding - basic	83,010	84,813	83,872	84,459
Add: Dilutive effect of stock options and restricted stock awards	1,743	1,810	1,705	1,727
Dilutive effect of Senior Notes	15,682	15,682	15,682	15,682
Diluted weighted average number of common shares outstanding	100,435	102,305	101,259	101,868
Diluted income from continuing operations per common share (in Dollars per share)	$ 0.21	$ 0.13	$ 0.34	$ 0.29
Stock options and restricted stock excluded from calculation of diluted earnings per share because anti-dilutive for the period	816	377	719	240
Basic income from continuing operations per common share (in Dollars per share)	$ 0.24	$ 0.14	$ 0.38	$ 0.32