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Costs and Estimated Earnings on Uncompleted Contracts (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Costs and Estimated Earnings on Uncompleted Contracts
Costs incurred on uncompleted contracts	$ 4,957,107	$ 5,194,769
Gross profit recognized	575,481	613,510
Costs and Estimated Earnings on Uncompleted Contracts	5,532,588	5,808,279
Less: billings to date	(5,560,908)	(5,898,220)
Net cost and estimated earnings in excess of billings	(28,320)	(89,941)
Amount included in consolidated balance sheet
Costs and estimated earnings in excess of billings	116,517	68,654
Billings in excess of costs and estimated earnings	(144,837)	(158,595)
Net cost and estimated earnings in excess of billings	$ (28,320)	$ (89,941)

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Represents the billings to date on all uncompleted contracts.

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Represents the total amount of costs incurred plus estimated earnings on uncompleted contracts.

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Represents the amount of costs incurred on uncompleted contracts.

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Represents the amount of gross profit recognized on uncompleted contracts.

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Represents the net costs and estimated earnings in excess of billings on all uncompleted contracts.

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Liability attributable to (i) billings in excess of costs under the percentage of completion contract accounting method representing the difference between contractually invoiced amounts (billings) and revenue recognized based, for example, on costs incurred to estimated total costs at period end or (ii) contractually invoiced amounts (billings) in excess of costs incurred and accumulated under the completed contract accounting method that are expected to be realized within one year or one operating cycle, whichever is longer, from the reporting date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



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Amount of receivable reflecting the cost incurred on uncompleted contracts in excess of related billings which is expected to be collected within one year or the normal operating cycle, if longer.

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