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RECEIVABLES (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Billed receivables:    
Trade and other receivables $ 435,172 $ 363,241
Less: Allowance for doubtful accounts (5,664) (5,619)
Net billed receivables 429,508 357,622
Unbilled receivables:    
Recoverable costs and estimated earnings not billed 153,045 150,526
Less: Progress payments applied (16,264) (12,668)
Net unbilled receivables 136,781 137,858
Receivables, net $ 566,289 $ 495,480