Accounts Receivable (Tables)

3 Months Ended

Mar. 31, 2019

Accounts and Notes Receivable, Net [Abstract]

Schedule of Accounts Receivable

Accounts receivable consist of the following:

	As of
	March 31, 2019		December 31, 2018
(in thousands)
Receivables from contracts with customers, less doubtful accounts of $14,152 and $14,775	$	503,753	$	538,021
Other receivables	47,864		44,259
	$	551,617	$	582,280