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Business Acquisition - Pro Forma Information (Details)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2016
USD ($)
$ / shares
Business Acquisition, Pro Forma Information [Abstract]  
Contract revenues $ 610,695
Operating income from continuing operations 5,593
Net loss $ (2,677)
Basic (loss) earnings per share (USD per share) | $ / shares $ (0.10)
Diluted (loss) earnings per share (USD per share) | $ / shares $ (0.10)