RECEIVABLES (Narrative) (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
ConcentrationRiskLineItems
Net unbilled receivables	$ 290,461	$ 235,018
GovernmentContractsConcentrationRiskMember
ConcentrationRiskLineItems
Accounts Receivable, before Allowance for Credit Loss	401,000	352,700
Net unbilled receivables	$ 253,500	$ 198,600
GovernmentContractsConcentrationRiskMember \| Revenue Benchmark \| Concentration Risk Threshold Percentage
ConcentrationRiskLineItems
ConcentrationRiskPercentage	55.00%	53.00%

Amount, before 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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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time, classified as current.

+ References

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-Publisher FASB
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