Accounts Receivable (Tables)

9 Months Ended

Sep. 30, 2015

Accounts Receivable, Net [Abstract]

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

Accounts receivable consisted of the following as of September 30, 2015 and December 31, 2014 (dollars in thousands):

	September 30, 2015			December 31, 2014
Accounts receivable - trade	$	317,102		$	304,087
Accounts receivable - grants from outside parties	25,009			32,076
Accounts receivable - insurance and other third-party claims	22,253			26,941
Total accounts receivable	364,364			363,104
Less: Allowance for doubtful accounts	(5,248		)	(5,826		)
Accounts receivable, net	$	359,116		$	357,278

Grant amortization offset to depreciation expense [Table Text Block]

The following table sets forth the offset to depreciation expense from the amortization of deferred grants recorded by the Company during the three and nine months ended September 30, 2015 and 2014 (dollars in thousands):

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2015		2014		2015		2014
Amortization of deferred grants	$	2,501	$	2,727	$	8,025	$	8,170