RECEIVABLES (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Billed receivables:
Trade and other receivables	$ 367,631	$ 340,091
Less: Allowance for doubtful accounts	(7,306)	(4,832)
Net billed receivables	360,325	335,259
Unbilled receivables:
Recoverable costs and estimated earnings not billed	178,479	149,847
Less: Progress payments applied	(22,838)	(22,044)
Net unbilled receivables	155,641	127,803
Receivables, net	$ 515,966	$ 463,062

-- None. No documentation exists for this element. --

No definition available.

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- Definition

For an unclassified balance sheet, the amount due from customers or clients for goods or services that have been delivered or sold in the normal course of business, reduced to their estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

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- Definition

For an unclassified balance sheet, a valuation allowance for receivables due a company that are expected to be uncollectible.

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- Definition

Amounts due for billed services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the Company and, at a minimum, one other party. An example would be amounts billed to customers under contracts or programs but not paid as of the balance sheet date.

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- Definition

The amount of the offset related to government or other customer advances received on a contract when the expected advances will be applied in payment to those particular charges of the receivable.

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- Definition

The total amount due to the entity within one year of the balance sheet date (or one operating cycle, if longer) from outside sources, including trade accounts receivable, notes and loans receivable, as well as any other types of receivables, net of allowances established for the purpose of reducing such receivables to an amount that approximates their net realizable value.

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Unbilled amounts due for services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the entity and, at a minimum, one other party. An example would be amounts associated with contracts or programs where the recognized revenue for performance thereunder exceeds the amounts billed under the terms thereof as of the date of the balance sheet.

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Amount of unbilled receivables under long-term contracts that have not been billed and were not billable.

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