Percentage represents the Company's ownership percentage in the joint venture.

No definition available.

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- Definition

Related Party's Ownership Percentage In Joint Venture

+ References

No definition available.

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- Definition

Variable Interest Entity's Ownership Percentage In Joint Venture

+ References

No definition available.

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- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold, or consumed within one year (or the normal operating cycle, if longer). Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

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- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold or consumed after one year or beyond the normal operating cycle, if longer.

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- Definition

Total obligations incurred as part of normal operations that are expected to be paid during the following twelve months or within one business cycle, if longer.

+ References

+ Details

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- Definition

Amount, excluding 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.

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Variable Interest Entities (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Assets, Current	$ 3,175,643				$ 3,074,392				$ 3,175,643	$ 3,074,392
Liabilities, Current	1,597,966				1,581,846				1,597,966	1,581,846
REVENUE	1,183,284	$ 1,123,137	$ 1,120,085	$ 1,028,156	1,193,068	$ 1,199,505	$ 1,247,274	$ 1,117,361	$ 4,454,662	4,757,208	$ 4,973,076
O&G [Member]
Ownership percentage in joint venture									75.00%
Related party's ownership percentage in joint venture									25.00%
Purple Line Segment 2 Expansion Project [Member] \| O&G [Member]
Ownership percentage in joint venture									75.00%
Related party's ownership percentage in joint venture									25.00%
Purple Line Segment 2 Expansion Project [Member] \| O&G [Member] \| Scenario, Plan [Member]
REVENUE									$ 1,400,000
Parsons Corporation [Member] \| Newark Liberty International Airport Terminal One Project [Member]
Ownership percentage in joint venture									80.00%
Variable Interest Entity's Ownership Percentage In Joint Venture									20.00%
Parsons Corporation [Member] \| Newark Liberty International Airport Terminal One Project [Member] \| Scenario, Plan [Member]
REVENUE									$ 1,400,000
Variable Interest Entity, Not Primary Beneficiary [Member]
Assets, Current	4,000				800				4,000	800
Liabilities, Current	3,800				800				3,800	800
Variable Interest Entity, Primary Beneficiary [Member]
Assets, Current	173,900				95,500				173,900	95,500
Assets, Noncurrent	51,500				11,600				51,500	11,600
Liabilities, Current	$ 319,900				$ 140,700				$ 319,900	$ 140,700