Goodwill and Other Identifiable Intangible Assets (Changes in the Carrying Amount of Goodwill) (Details) $ in Thousands	9 Months Ended
	Mar. 31, 2019 USD ($)
Goodwill [Roll Forward]
Balance as of June 30, 2018	$ 298,174
Additions	21,618
Foreign currency translation adjustment	(750)
Balance as of March 31, 2019	319,042
Barcode, Networking & Security Segment [Member]
Goodwill [Roll Forward]
Balance as of June 30, 2018	137,214
Additions	0
Foreign currency translation adjustment	(75)
Balance as of March 31, 2019	137,139
Communications & Services Segment [Member]
Goodwill [Roll Forward]
Balance as of June 30, 2018	160,960
Additions	21,618
Foreign currency translation adjustment	(675)
Balance as of March 31, 2019	$ 181,903