Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events (Details)

v3.5.0.2
Subsequent Events (Details) - USD ($)
3 Months Ended 9 Months Ended
Oct. 27, 2016
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Subsequent Event [Line Items]          
Dividends declared per share (usd per share)   $ 0.01 $ 0.10 $ 0.03 $ 0.30
Subsequent Event          
Subsequent Event [Line Items]          
Dividends declared, date Oct. 27, 2016        
Dividends declared per share (usd per share) $ 0.01        
Dividends declared, payable date Nov. 23, 2016        
Dividends declared, record date Nov. 10, 2016        
Customer Concentration Risk | Costs in Excess of Billings | Collectibility of Receivables          
Subsequent Event [Line Items]          
Contracts receivable   $ 0   $ 0