Construction Joint Ventures - Additional Information (Details) $ in Thousands	3 Months Ended
Mar. 31, 2019 USD ($) project	Mar. 31, 2018 USD ($)
Construction Joint Venture
Construction Contract Value	$ 3,300,000
Revenue	619,801	$ 563,379
Net cash provided by (used in) operating activities	(36,364)	(37,620)
Corporate Joint Venture [Member]
Construction Joint Venture
Revenue Remaining to be Recognized on Unconsolidated Construction Joint Ventures	2,800,000
Equity Method Investee [Member]
Construction Joint Venture
Revenue Remaining to be Recognized on Unconsolidated Construction Joint Ventures	900,000
Unconsolidated Construction Joint Venture Net Income (Loss)	500	2,600
Co-venturer [Member]
Construction Joint Venture
Revenue Remaining to be Recognized on Unconsolidated Construction Joint Ventures	$ 1,900,000
Majority Shareholder [Member]
Construction Joint Venture
Number of active construction joint venture projects \| project	6
Construction Contract Value	$ 1,100,000
Revenue	330,100
Revenue	67,000	43,800
Net cash provided by (used in) operating activities	3,000	(2,500)
Majority Shareholder [Member] \| Minimum [Member]
Construction Joint Venture
Construction Contract Value	14,800
Revenue	$ 200
Proportionate Share of the Joint Ventures Equity Owned by or Beneficial Interest in the Reporting Entity Directly or Indirectly	50.00%
Majority Shareholder [Member] \| Maximum [Member]
Construction Joint Venture
Construction Contract Value	$ 409,700
Revenue	$ 162,300
Proportionate Share of the Joint Ventures Equity Owned by or Beneficial Interest in the Reporting Entity Directly or Indirectly	65.00%
Principal Owner [Member]
Construction Joint Venture
Number of active construction joint venture projects \| project	9
Construction Contract Value	$ 11,300,000
Revenue	914,500,000
Unconsolidated Construction Joint Venture Net Income (Loss)	5,200	$ (141,000)
Principal Owner [Member] \| Minimum [Member]
Construction Joint Venture
Construction Contract Value	$ 100
Proportionate Share of the Joint Ventures Equity Owned by or Beneficial Interest in the Reporting Entity Directly or Indirectly	20.00%
Revenue	$ 1,900
Principal Owner [Member] \| Maximum [Member]
Construction Joint Venture
Construction Contract Value	$ 3,800,000
Proportionate Share of the Joint Ventures Equity Owned by or Beneficial Interest in the Reporting Entity Directly or Indirectly	50.00%
Revenue	$ 247,800

Construction joint venture.

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Contract value of active construction joint venture projects.

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Number of active joint venture projects.

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Revenue attributable to parent per project remaining to be recognized on unconsolidated construction joint ventures.

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Unconsolidated construction joint venture net income (loss).

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The amount of revenue from sale of goods and services reduced by sales returns, allowances, and discounts reported by an equity method investment of the entity.

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Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

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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.

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