Accounts Receivable

6 Months Ended

Jun. 30, 2011

Accounts Receivable, Net [Abstract]

Accounts Receivable

ACCOUNTS RECEIVABLE:

Accounts receivable consisted of the following as of June 30, 2011 and December 31, 2010 (dollars in thousands):

	June 30, 2011			December 31, 2010
Accounts receivable - trade	$	139,033		$	118,265
Accounts receivable - grants	17,277			17,039
Total accounts receivable	156,310			135,304
Less: Allowance for doubtful accounts	(2,979		)	(3,079		)
Accounts receivable, net	$	153,331		$	132,225