Accounts Receivable (Tables)

9 Months Ended

Sep. 30, 2019

Accounts Receivable, Net [Abstract]

Schedule of Accounts, Notes, Loans and Financing Receivable

Accounts receivable consisted of the following as of September 30, 2019 and December 31, 2018 (dollars in thousands):

	September 30, 2019			December 31, 2018
Accounts receivable – trade	$	395,512		$	397,255
Accounts receivable – grants from outside parties	24,677			19,376
Accounts receivable – insurance and other third-party claims	29,386			19,729
Total accounts receivable	449,575			436,360
Less: Allowance for doubtful accounts	(12,513		)	(10,055		)
Accounts receivable, net	$	437,062		$	426,305

Grant amortization offset to depreciation expense

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, 2019 and 2018 (dollars in thousands):

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2019		2018		2019		2018
Amortization of deferred grants	$	3,442	$	3,173	$	10,265	$	8,776