Segment Information (Financial Information by Segment) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Sales	$ 872,483	$ 893,357	$ 2,850,812	$ 2,912,278
Depreciation and amortization	9,539	9,363	28,427	27,566
Change in fair value of contingent consideration	618	5,101	6,266	11,535
Operating income (loss)	6,289	18,804	43,390	69,942
Capital expenditures	3,867	5,197	6,617	10,977
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	795	895	2,384	2,685
Operating income (loss)	(780)	(222)	(2,689)	(988)
Capital expenditures	0	0	0	4
Reportable Geographical Components [Member] \| United States and Canada [Member]
Segment Reporting Information [Line Items]
Sales	676,703	678,078	2,198,173	2,210,729
Reportable Geographical Components [Member] \| International [Member]
Segment Reporting Information [Line Items]
Sales	202,310	221,202	677,478	722,715
Geography Eliminations [Member]
Segment Reporting Information [Line Items]
Sales	(6,530)	(5,923)	(24,839)	(21,166)
Barcode, Networking & Security Segment [Member]
Segment Reporting Information [Line Items]
Sales	583,642	596,913	1,967,670	1,953,664
Barcode, Networking & Security Segment [Member] \| Operating Segments [Member]
Segment Reporting Information [Line Items]
Sales	583,642	596,913	1,967,670	1,953,664
Depreciation and amortization	4,298	4,371	13,019	13,387
Change in fair value of contingent consideration	0	0	0	0
Operating income (loss)	3,870	16,865	29,938	48,974
Capital expenditures	1,878	2,298	3,324	6,038
Communications & Services Segment [Member]
Segment Reporting Information [Line Items]
Sales	288,841	296,444	883,142	958,614
Communications & Services Segment [Member] \| Operating Segments [Member]
Segment Reporting Information [Line Items]
Sales	288,841	296,444	883,142	958,614
Depreciation and amortization	4,446	4,097	13,024	11,494
Change in fair value of contingent consideration	618	5,101	6,266	11,535
Operating income (loss)	3,199	2,161	16,141	21,956
Capital expenditures	$ 1,989	$ 2,899	$ 3,293	$ 4,935

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
-Publisher FASB
-Name Accounting Standards Codification
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