Note 7 - Fair Value of Financial Instruments and Concentrations of Credit Risk (Tables)

12 Months Ended

Dec. 31, 2012

Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]

(In thousands)	2012			2011
Gross trade receivables	$	307,276		$	306,791
Allowance for doubtful accounts		(4,078	)		(3,161	)
Net trade receivables		303,198			303,630
Other receivables		20,241			24,960
Total receivables, net	$	323,439		$	328,590

Allowance for Doubtful Accounts Receivable [Table Text Block]

(In thousands)	2012			2011			2010
Balance at beginning of year	$	3,161		$	5,839		$	5,969
Provision for uncollectible accounts		1,709			2,400			478
Write-offs, net of recoveries		(792	)		(5,078	)		(608	)
Balance at end of year	$	4,078		$	3,161		$	5,839