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RECEIVABLES (Detail) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Billed receivables:    
Trade and other receivables $ 382,464 $ 418,968
Less: Allowance for doubtful accounts (8,364) (8,733)
Net billed receivables 374,100 410,235
Unbilled receivables:    
Recoverable costs and estimated earnings not billed 263,756 231,067
Less: Progress payments applied 7,230 9,108
Net unbilled receivables 256,526 221,959
Receivables, net $ 630,626 $ 632,194