Accounts Receivable

9 Months Ended

Sep. 30, 2013

Accounts Receivable, Net [Abstract]

Accounts Receivable [Text Block]

Accounts receivable consisted of the following as of September 30, 2013 and December 31, 2012 (dollars in thousands):

	September 30, 2013			December 31, 2012
Accounts receivable - trade	$	264,958		$	214,936
Accounts receivable - grants	33,183			26,794
Accounts receivable - insurance claims	18,097			23,912
Total accounts receivable	316,238			265,642
Less: Allowance for doubtful accounts	(2,956		)	(2,693		)
Accounts receivable, net	$	313,282		$	262,949