Note 1 - Reconciliation of Basic Weighted-average Shares Outstanding to Diluted Weighted-average Shares Outstanding (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Weighted-average shares outstanding (in shares)	71,878	71,637	71,835	64,968
Common stock equivalents for stock options and restricted shares (in shares)	870	633	830	561
Weighted-average shares outstanding-diluted (in shares)	72,748	72,270	72,665	65,529