Quarterly report pursuant to Section 13 or 15(d)

Backlog - Schedule of Reconciliation of Backlog Representing Signed Contracts (Details)

v3.8.0.1
Backlog - Schedule of Reconciliation of Backlog Representing Signed Contracts (Details)
$ in Thousands
9 Months Ended
Sep. 30, 2017
USD ($)
Balance
Contract amount gross 390,710
Less contract revenues earned (117,202)
Balance 273,508
New Contracts and Adjustments [Member]  
Contract amount gross $ 390,710