Note 1 - Basis of Presentation (Details) - Reconciliation of Basic Weighted-average Shares Outstanding to Diluted Weighted-average Shares Outstanding In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Reconciliation of Basic Weighted-average Shares Outstanding to Diluted Weighted-average Shares Outstanding [Abstract]
Weighted-average shares outstanding - basic	57,863	57,713	57,857	57,600
Common stock equivalents for stock options and restricted stock	531	365	473	307
Weighted-average shares outstanding - diluted	58,394	58,078	58,330	57,907