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Concentration of Risk and Enterprise Wide Disclosures (Tables)

12 Months Ended

Dec. 31, 2017

Segment Reporting [Abstract]

Schedule of Revenue by Major Customers by Reporting Segments

The following table shows contract revenues generated from the Company’s customers that accounted for more than 10% of consolidated revenues (amounts in thousands):

	Years Ended December 31,
	2017							2016							2015
	Amount				%			Amount				%			Amount				%
Utah Department of Transportation (“UDOT”)	$	140,529			14.7	%		$	79,421			11.5	%		*				*
Texas Department of Transportation (“TXDOT”)	103,236				10.8	%		85,224				12.4	%		84,129				13.5	%
California Department of Transportation (“Caltrans”)	*				*			88,627				12.8	%		$	96,470			15.5	%

*Represents less than 10% of revenues

X

- Definition

Tabular disclosure of the extent of the entity's reliance on its major customers, if revenues from transactions with a single external customer amount to 10 percent or more of entity revenues, including the disclosure of that fact, the total amount of revenues from each such customer, and the identity of the reportable segment or segments reporting the revenues. The entity need not disclose the identity of a major customer or the amount of revenues that each segment reports from that customer. For these purposes, a group of companies known to the entity to be under common control is considered a single customer, and the federal government, a state government, a local government such as a county or municipality, or a foreign government is each considered a single customer.

+ References

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- References

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