Accounts Receivable	9 Months Ended
	Sep. 30, 2018
Accounts Receivable Additional Disclosures [Abstract]
Accounts Receivable	ACCOUNTS RECEIVABLECredit is extended based upon an evaluation of the customer’s financial condition and, while collateral is not required, the Company periodically receives surety bonds that guarantee payment. Credit terms are consistent with industry standards and practices. The amounts of trade accounts receivable as of September 30, 2018 and December 31, 2017 have been reduced by an allowance for doubtful accounts of $1,297 and $2,151, respectively. Changes in reserves for uncollectable accounts are recorded as part of selling and administrative expenses in the Condensed Consolidated Statements of Operations, and were income of $268 and expense of $208 for the three months ended September 30, 2018 and 2017, respectively, and income of $987 and expense of $737 for the nine months ended September 30, 2018 and 2017, respectively.