Note 1 - Basis of Presentation - Reconciliation of Basic Weighted-average Shares Outstanding to Diluted Weighted-average Shares Outstanding (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Weighted-average shares outstanding (in shares)	71,638	57,863	67,215	57,857
Common stock equivalents for stock options and restricted stock (in shares)	703	531	609	473
Weighted-average shares outstanding-diluted (in shares)	72,341	58,394	67,824	58,330