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

12 Months Ended

Dec. 31, 2015

Notes Tables

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

(In thousands)		2015			2014
Gross trade receivables	$	159,119		$	299,962
Allowance for doubtful accounts		(7,189	)		(5,458	)
Net trade receivables		151,930			294,504
Income tax receivables		32,600			1,258
Other receivables		21,834			22,838
Total receivables, net	$	206,364		$	318,600

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

(In thousands)		2015			2014		2013
Balance at beginning of year	$	5,458		$	4,142	$	3,950
Provision for uncollectible accounts		1,886			1,246		309
Write-offs, net of recoveries		(155	)		70		(117	)
Balance at end of year	$	7,189		$	5,458	$	4,142