Accounts Receivable (Tables)

12 Months Ended

Dec. 31, 2013

ACCOUNTS RECEIVABLE: [Abstract]

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

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

	2013			2012
Accounts receivable - trade	$	264,562		$	216,694
Accounts receivable - grants from outside parties	33,003			25,036
Accounts receivable - insurance and other third-party claims	31,643			23,912
Total accounts receivable	329,208			265,642
Less: allowance for doubtful accounts	(3,755		)	(2,693		)
Accounts receivable, net	$	325,453		$	262,949

Allowance for doubtful accounts [Table Text Block]

Activity in the Company’s allowance for doubtful accounts for the years ended December 31, 2013, 2012 and 2011 was as follows (dollars in thousands):

	2013			2012			2011
Balance, beginning of year	$	2,693		$	2,807		$	3,079
Provisions	2,741			977			1,055
Charges	(1,679		)	(1,091		)	(1,327		)
Balance, end of year	$	3,755		$	2,693		$	2,807