Note 8 - Fair Value of Financial Instruments and Concentrations of Credit Risk (Tables)

12 Months Ended

Dec. 31, 2013

Fair Value Disclosures [Abstract]

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

(In thousands)		2013			2012
Gross trade receivables	$	252,168		$	296,117
Allowance for doubtful accounts		(4,142	)		(3,950	)
Net trade receivables		248,026			292,167
Other receivables		20,503			20,125
Total receivables, net	$	268,529		$	312,292

Allowance for Credit Losses on Financing Receivables [Table Text Block]

(In thousands)		2013			2012			2011
Balance at beginning of year	$	3,950		$	3,149		$	5,571
Provision for uncollectible accounts		309			1,614			2,403
Write-offs, net of recoveries		(117	)		(813	)		(4,825	)
Balance at end of year	$	4,142		$	3,950		$	3,149