Accounts Receivable	6 Months Ended
	Jun. 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 at June 30, 2018 and December 31, 2017 have been reduced by an allowance for doubtful accounts of $1,570 and $2,151, respectively. Reserves for uncollectable accounts are recorded as part of selling and administrative expenses in the Condensed Consolidated Statements of Operations, and were income of $473 and expense of $54 for the three months ended June 30, 2018 and 2017, respectively. Reserves for uncollectable accounts were income of $719 and expense of $529 for the six months ended June 30, 2018 and 2017, respectively.