Accounts Receivable (Tables)

12 Months Ended

Dec. 31, 2019

Receivables [Abstract]

Schedule of Accounts Receivable

Accounts receivable at December 31 consisted of the following (in thousands):

	2019			2018
Trade accounts receivable	$	133,238		$	124,609
Costs in excess of billings	20,607			22,634
Total accounts receivables	153,845			147,243
Less allowance for doubtful accounts	(6,330		)	(6,960		)
Accounts receivable	$	147,515		$	140,283