Annual report pursuant to Section 13 and 15(d)

Accounts Receivable - Summary of Accounts Receivable (Detail)

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Accounts Receivable - Summary of Accounts Receivable (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Receivables [Abstract]    
Trade accounts receivable $ 87,282 $ 87,575
Unbilled recoverable costs and accrued profits 8,307 1,606
Total receivables 95,589 89,181
Less allowance for doubtful accounts (312) (293)
Accounts receivable $ 95,277 $ 88,888