Accounts Receivable, Net - Accounts Receivable due to contract changes, negotiated settlements and claims for unanticipated cost (Details) - USD ($) $ in Thousands |
Sep. 30, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Accounts Receivable, Net [Abstract] | ||
| Contract changes, negotiated settlements and claims for unanticipated contract costs | $ 900 | $ 900 |