Accounts Receivable (Tables)

9 Months Ended

Sep. 30, 2017

Receivables [Abstract]

Schedule of Accounts Receivable

As of September 30, 2017 and December 31, 2016, Accounts receivable consisted of the following:

(in thousands)	September 30, 2017		December 31, 2016
Trade and other accounts receivable	$157,171		$146,460
Bank promissory notes	19,525		15,759
Revenue in excess of progress billings	30,957		15,926
Allowance for doubtful accounts	(7,715	)	(6,952	)
Total accounts receivable	$199,938		$171,193

Schedule of Contract Receivables

As of September 30, 2017 and December 31, 2016, Contract receivables consisted of the following:

(in thousands)	September 30, 2017	December 31, 2016
Contract receivable	$29,688	$14,045