Accounts Receivable (Tables)

3 Months Ended

Mar. 31, 2014

Accounts Receivable, Net [Abstract]

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

Accounts receivable consisted of the following as of March 31, 2014 and December 31, 2013 (dollars in thousands):

	March 31, 2014			December 31, 2013
Accounts receivable - trade	$	257,264		$	264,562
Accounts receivable - grants from outside parties	23,052			33,003
Accounts receivable - insurance claims and other third-party claims	49,496			31,643
Total accounts receivable	329,812			329,208
Less: Allowance for doubtful accounts	(3,652		)	(3,755		)
Accounts receivable, net	$	326,160		$	325,453