Quarterly report pursuant to Section 13 or 15(d)

Acquisitions (Schedule of Supplemental Pro Forma Results of Operations) (Details)

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Acquisitions (Schedule of Supplemental Pro Forma Results of Operations) (Details) - Tri-State Technical Services [Member] - USD ($)
$ in Thousands
9 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Business Acquisition [Line Items]    
Revenues $ 132,631 $ 108,858
Net income $ 5,013 $ 5,732