Note 1 - Basis of Presentation (Tables)

6 Months Ended

Jun. 30, 2013

Disclosure Text Block [Abstract]

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

	Three Months Ended				Nine Months Ended
	June 30,				June 30,
	2013		2012		2013		2012
Weighted-average shares outstanding-basic		57,561		57,151		57,542		57,149
Common stock equivalents for stock options and restricted stock		378		39		278		20
Weighted-average shares outstanding-diluted		57,939		57,190		57,820		57,169

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

	June 30,			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]

							Estimated
	June 30,			December 31,			Useful Lives
	2013			2012			(in years)
Property and equipment:
Land	$	24,583		$	24,383
Buildings and improvements		56,213			55,709			7	to	40
Equipment		324,096			313,761			3	to	20
		404,892			393,853
Accumulated depreciation		(269,674	)		(258,715	)
Total property and equipment, net	$	135,218		$	135,138