Note 1 - Basis of Presentation (Tables)

3 Months Ended

Mar. 31, 2013

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

	Three Months Ended
	March 31,
	2013		2012
Weighted-average shares outstanding-basic		57,523		57,148
Common stock equivalents for stock options and restricted stock		178		-
Weighted-average shares outstanding-diluted		57,701		57,148

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

	March 31,			December 31,
	2013			2012
Accumulated balances of items included in accumulated other comprehensive loss:
Increase in pension liability	$	(33,065	)	$	(33,065	)
Income tax benefit		(12,895	)		(12,895	)
Accumulated other comprehensive loss	$	(20,170	)	$	(20,170	)

Property, Plant and Equipment [Table Text Block]

	March 31,			December 31,			Estimated Useful Lives
	2013			2012			(in years)
Property and equipment:
Land	$	24,399		$	24,383
Buildings and improvements		56,024			55,709		7	to	40
Equipment		318,724			313,761		3	to	20
		399,147			393,853
Accumulated depreciation		(264,040	)		(258,715	)
Total property and equipment, net	$	135,107		$	135,138