RECEIVABLES (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Billed receivables:
Trade and other receivables	$ 415,774	$ 390,306
Less: Allowance for doubtful accounts	(9,003)	(7,436)
Net billed receivables	406,771	382,870
Unbilled receivables:
Recoverable costs and estimated earnings not billed	243,403	225,810
Less: Progress payments applied	(14,116)	(14,925)
Net unbilled receivables	229,287	210,885
Receivables, net	$ 636,058	$ 593,755

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

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- Definition

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business.

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- Definition

Amount of allowance for credit loss on accounts receivable.

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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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- Definition

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

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