Segment Information (Financial Information by Segment) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Sales	$ 989,503	$ 1,046,021	$ 1,996,430	$ 2,018,921
Depreciation and amortization	9,700	8,935	18,889	18,203
Change in fair value of contingent consideration	3,176	1,850	5,649	6,434
Operating income (loss)	18,497	29,706	37,101	51,137
Capital expenditures	1,809	4,790	2,750	5,780
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	581	869	1,588	1,790
Operating income (loss)	(1,151)	(414)	(1,909)	(769)
Capital expenditures	0	0	0	4
Reportable Geographical Components [Member] \| United States and Canada [Member]
Segment Reporting Information [Line Items]
Sales	745,377	786,689	1,523,895	1,532,651
Reportable Geographical Components [Member] \| International [Member]
Segment Reporting Information [Line Items]
Sales	253,378	266,570	490,845	501,513
Geography Eliminations [Member]
Segment Reporting Information [Line Items]
Sales	(9,252)	(7,238)	(18,310)	(15,243)
Barcode, Networking & Security Segment [Member]
Segment Reporting Information [Line Items]
Sales	686,237	701,639	1,384,028	1,356,752
Barcode, Networking & Security Segment [Member] \| Operating Segments [Member]
Segment Reporting Information [Line Items]
Sales	686,237	701,639	1,384,028	1,356,752
Depreciation and amortization	4,435	4,283	8,722	9,016
Change in fair value of contingent consideration	0	0	0	0
Operating income (loss)	14,076	18,581	26,068	32,112
Capital expenditures	915	2,784	1,446	3,740
Communications & Services Segment [Member]
Segment Reporting Information [Line Items]
Sales	303,266	344,382	612,402	662,169
Communications & Services Segment [Member] \| Operating Segments [Member]
Segment Reporting Information [Line Items]
Sales	303,266	344,382	612,402	662,169
Depreciation and amortization	4,684	3,783	8,579	7,397
Change in fair value of contingent consideration	3,176	1,850	5,649	6,434
Operating income (loss)	5,572	11,539	12,942	19,794
Capital expenditures	$ 894	$ 2,006	$ 1,304	$ 2,036

Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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