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ACQUISITION ACTIVITY - Revenue and Income (Details) - USD ($) $ in Thousands	10 Months Ended	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
ETD
Business Combinations
Revenue since acquisition date		$ 76,500
Pre-tax income since acquisition date		$ 10,700
Pro forma results of operations assuming the acquisitions had occurred on July 1, 2015, 2016, and 2017
Revenues			$ 1,036,814	$ 909,171
Income from operations			46,725	60,550
AS&E
Business Combinations
Revenue since acquisition date	$ 94,000
Pre-tax income since acquisition date	$ 8,700
Pro forma results of operations assuming the acquisitions had occurred on July 1, 2015, 2016, and 2017
Revenues			978,706	928,679
Income from operations			5,856	2,223
Non-recurring acquisition and employee termination costs			$ 13,900	$ 28,600

X

- Definition

Amount of non-recurring expenditure relating to acquisition related expenses and employee severance costs.

+ References

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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- References

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- Definition

The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(2)-(3)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

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- Definition

The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(2)-(3)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

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- Definition

This element represents the amount of earnings or loss of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

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- Definition

This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

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