Contracts Revenue, Percent

No definition available.

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- Definition

Number of customers exceeding the 10% benchmark percentage.

+ References

No definition available.

+ Details

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- Definition

Trade Accounts Receivable and Contract Receivable Retainage, Gross

+ References

No definition available.

+ Details

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- Definition

Trade Accounts Receivable and Contract Receivable Retainage, Net

+ References

No definition available.

+ Details

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- Definition

Amount of allowance for credit loss on accounts receivable, classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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- Definition

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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Concentration of Risk and Enterprise Wide Disclosures (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020 USD ($) customer	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) customer	Sep. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Concentration Risk [Line Items]
Allowance for credit losses	$ (411)		$ (411)		$ (2,600)
Contract revenues	$ 189,433	$ 199,507	$ 539,766	$ 508,597
Foreign
Concentration Risk [Line Items]
Contract revenues, percent	0.90%	2.30%	1.80%	1.50%
Customer concentration risk \| Trade and contract retainage receivables
Concentration Risk [Line Items]
Gross receivables	$ 127,253		$ 127,253		161,687
Allowance for credit losses	(411)		(411)		(2,600)
Trade and retainage receivables	126,842		$ 126,842		$ 159,087
Concentration risk, percentage			100.00%		100.00%
Customer concentration risk \| Contract revenues
Concentration Risk [Line Items]
Contract revenues	$ 189,433	$ 199,507	$ 539,766	$ 508,597
Contract revenues, percent	100.00%	100.00%	100.00%	100.00%
Customer concentration risk \| Federal Government \| Trade and contract retainage receivables
Concentration Risk [Line Items]
Gross receivables	$ 258		$ 258		$ 4,765
Concentration risk, percentage					3.00%
Customer concentration risk \| Federal Government \| Contract revenues
Concentration Risk [Line Items]
Contract revenues	$ 16,499	$ 13,564	$ 32,720	$ 36,142
Contract revenues, percent	9.00%	7.00%	6.00%	7.00%
Customer concentration risk \| State Governments \| Trade and contract retainage receivables
Concentration Risk [Line Items]
Gross receivables	$ 382		$ 382		$ 5,864
Concentration risk, percentage					4.00%
Customer concentration risk \| State Governments \| Contract revenues
Concentration Risk [Line Items]
Contract revenues	$ 6,322	$ 19,872	$ 27,646	$ 34,213
Contract revenues, percent	3.00%	10.00%	5.00%	7.00%
Customer concentration risk \| Local Governments \| Trade and contract retainage receivables
Concentration Risk [Line Items]
Gross receivables	$ 22,870		$ 22,870		$ 41,944
Concentration risk, percentage			18.00%		26.00%
Customer concentration risk \| Local Governments \| Contract revenues
Concentration Risk [Line Items]
Number of customers exceeding the 10% benchmark percentage \| customer	1		1
Contract revenues	$ 54,316	$ 54,654	$ 158,176	$ 150,683
Contract revenues, percent	29.00%	27.00%	29.00%	30.00%
Customer concentration risk \| Local Governments \| Contract revenues \| Customer One
Concentration Risk [Line Items]
Concentration risk, percentage	13.80%		11.20%
Customer concentration risk \| Private Companies \| Trade and contract retainage receivables
Concentration Risk [Line Items]
Gross receivables	$ 103,743		$ 103,743		$ 109,114
Concentration risk, percentage			82.00%		67.00%
Customer concentration risk \| Private Companies \| Contract revenues
Concentration Risk [Line Items]
Contract revenues	$ 112,296	$ 111,417	$ 321,224	$ 287,559
Contract revenues, percent	59.00%	56.00%	60.00%	56.00%