Accounts Receivable (Tables)

3 Months Ended

Mar. 31, 2017

Receivables [Abstract]

Schedule of Accounts Receivable

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

(in thousands)	March 31,   2017		December 31, 2016
Trade and other accounts receivable	$145,879		$146,460
Bank promissory notes	16,828		15,759
Revenue in excess of progress billings	18,658		15,926
Allowance for doubtful accounts	(7,026	)	(6,952	)
Total accounts receivable	$174,339		$171,193

Schedule of Contract Receivables

As of March 31, 2017 and December 31, 2016, Contract Receivables consisted of the following:

(in thousands)	March 31, 2017	December 31,  2016
Contract receivable	$17,960	$14,045