Note 1 - Basis of Presentation (Tables)

9 Months Ended

Sep. 30, 2016

Notes Tables

Schedule of Weighted Average Number of Shares [Table Text Block]

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2016		2015		2016		2015
Weighted-average shares outstanding-basic		71,879		71,638		71,850		67,215
Common stock equivalents for stock options and restricted stock		-		703		873		609
Weighted-average shares outstanding-diluted		71,879		72,341		72,723		67,824

Property, Plant and Equipment [Table Text Block]

							Estimated
	September 30,			December 31,			Useful Lives
	2016			2015			(in years)
Property and equipment:
Land	$	45,306		$	36,529
Buildings and improvements		135,208			85,626			7	to	40
Equipment		468,692			420,380			3	to	20
		649,206			542,535
Accumulated depreciation		(320,577	)		(308,060	)
Total property and equipment, net	$	328,629		$	234,475