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Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Supplemental Cash Flow Elements [Abstract]
Accounts receivable, including retainage	$ (21,300)
Accounts receivable, including retainage		$ (11,094)	$ (29,923)
Contracts in progress, net	6,023	(4,397)	(3,492)
Receivables from and equity in construction joint ventures	1,524	659	(4,250)
Other current and non-current assets	43	924	929
Accounts payable	10,987	1,969	13,579
Accrued compensation and other liabilities	(839)	(4,038)	6,625
Members' interest subject to mandatory redemption and undistributed earnings	(340)	1,957	2,156
Changes in operating assets and liabilities	$ 3,902	$ 14,020	$ 14,376

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- Definition

Represents the increase (decrease) in member's interest subject to mandatory redemption and undistributed earnings.

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- Definition

The net change during the reporting period in Equity in and Receivable from unconsolidated joint ventures.

+ References

No definition available.

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- Definition

The increase (decrease) during the reporting period in the aggregate amount of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Section 45
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The increase (decrease) during the reporting period in the aggregate amount of expenses incurred but not yet paid.

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- Definition

Amount of increase (decrease) in right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

+ References

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Amount of increase (decrease) in obligation to transfer good or service to customer for which consideration has been received or is receivable.

+ References

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The increase (decrease) during the reporting period of all assets and liabilities used in operating activities.

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Amount of increase (decrease) in operating assets classified as other.

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The increase (decrease) during the reporting period of the amount of revenue for work performed for which billing has not occurred, net of uncollectible accounts.

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