RECEIVABLES (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Billed receivables:
Trade and other receivables	$ 362,348us-gaap_BilledContractReceivables	$ 363,241us-gaap_BilledContractReceivables
Less: Allowance for doubtful accounts	(7,251)	(5,619)
Net billed receivables	355,097us-gaap_AccountsReceivableNet	357,622us-gaap_AccountsReceivableNet
Unbilled receivables:
Recoverable costs and estimated earnings not billed	153,182us-gaap_UnbilledContractsReceivable	150,526us-gaap_UnbilledContractsReceivable
Less: Progress payments applied	(12,260)	(12,668)
Net unbilled receivables	140,922	137,858
Receivables, net	$ 496,019us-gaap_ReceivablesNetCurrent	$ 495,480us-gaap_ReceivablesNetCurrent

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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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