Note 1 - Basis of Presentation (Tables)

6 Months Ended

Jun. 30, 2018

Notes Tables

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

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2018		2017		2018		2017
Weighted-average shares outstanding-basic		87,765		71,821		88,408		71,849
Common stock equivalents for stock options and restricted shares		540		680		529		661
Weighted-average shares outstanding-diluted		88,305		72,501		88,937		72,510

Property, Plant and Equipment [Table Text Block]

							Estimated
	June 30,			December 31,			Useful Lives
	2018			2017			(in years)
Property and equipment:
Land	$	51,946		$	50,458
Buildings and improvements		157,667			156,924			7	to	40
Equipment		528,442			511,878			3	to	20
		738,055			719,260
Accumulated depreciation		(395,059	)		(368,602	)
Total property and equipment, net	$	342,996		$	350,658

Schedule of Disposal of Assets and Purchase of Property and Equipment [Table Text Block]

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2018			2017			2018			2017
Gain on disposal of assets, net:
Proceeds from sale of assets	$	63		$	90,900		$	104		$	90,950
Proceeds from FCC - Repack		909			-			1,846			-
Net book value of assets disposed		(178	)		(13,574	)		(335	)		(14,151	)
Total	$	794		$	77,326		$	1,615		$	76,799
Purchase of property and equipment:
Recurring purchases - operations							$	9,704		$	10,287
Repack								10,211			128
Total							$	19,915		$	10,415