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Business Acquisition - Pro Forma Results (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Business Acquisition, Pro Forma Information [Abstract]    
Contract Revenues   $ 139,365
Operating income from continuing operations   3,311
Net income   $ 1,019
Basic earnings per share (in dollars per share)   $ 0.04
Diluted earnings per share (in dollars per share)   $ 0.04
Federal statutory tax rate 35.00%