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Business Combinations - Pro Forma Information (Details) - FCC Environmental Acquisition [Member] - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 8 Months Ended
Sep. 10, 2016
Sep. 12, 2015
Sep. 10, 2016
Sep. 12, 2015
Business Acquisition [Line Items]        
Total revenues $ 81,872 $ 83,600 $ 241,602 $ 252,121
Net income $ 2,335 $ 2,892 $ 2,357 $ 4,107
Income per share        
Basic (in dollars per share) $ 0.10 $ 0.13 $ 0.11 $ 0.19
Diluted (in dollars per share) $ 0.10 $ 0.13 $ 0.11 $ 0.18