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Accounts Receivable, Trade (Tables)
 12 Months Ended
Dec. 31, 2011
Accounts Receivable, Trade [Abstract]  
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
Accounts receivable, trade consist of the following:
 
December 31,
 
2011
 
2010
 
(In thousands)
Accounts receivable
$
301,000

 
$
396,870

Allowance for sales credits
(2,185
)
 
(3,919
)
Allowance for doubtful accounts
(272
)
 
(624
)
Total accounts receivable trade, net of allowances
$
298,543

 
$
392,327