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Description of Business and Presentation of Financial Statements Description of Business (Tables)
 3 Months Ended
Mar. 31, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Balance Sheet Offsetting [Table Text Block]
 
Gross Payable
 
Gross Receivable Offset in Balance Sheet
 
Net Payable Recognized in Balance Sheet
 
(In thousands)
March 31, 2013
 
 
 
 
 
 
 
 
 
 
 
Accounts Payable
$
2,068,683

 
$
(729,264
)
 
$
1,339,419

 
 
 
 
 
 
December 31, 2012
 
 
 
 
 
 
 
 
 
 
 
Accounts Payable
$
2,037,549

 
$
(723,398
)
 
$
1,314,151