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
3 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Business Acquisition [Line Items]    
Revenues $ 48,557 $ 32,591
Net income $ 963 $ 767