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RECEIVABLES (Detail) - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Billed receivables:    
Trade and other receivables $ 353,816 $ 435,172
Less: Allowance for doubtful accounts (5,759) (5,664)
Net billed receivables 348,057 429,508
Unbilled receivables:    
Recoverable costs and estimated earnings not billed 151,063 153,045
Less: Progress payments applied (17,352) (16,264)
Net unbilled receivables 133,711 136,781
Receivables, net $ 481,768 $ 566,289