Segment Information (Financial Information by Segment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Revenues	$ 3,787,721	$ 3,529,935	$ 3,150,806
Depreciation and amortization	28,614	29,884	33,507
Change in fair value of contingent consideration	0	0	516
Operating income	135,886	122,167	61,483
Capital expenditures	(9,979)	(6,849)	(2,363)
Corporate
Depreciation and amortization	2,875	3,020	3,027
Operating income	(1,460)	(30)	(11,634)
Capital expenditures	0	0	(14)
Reportable Geographical Components | United States
Revenues	3,443,561	3,178,829	2,854,179
Reportable Geographical Components | International
Revenues	355,647	356,241	310,075
Less intercompany sales
Revenues	(11,487)	(5,135)	(13,448)
Specialty Technology Solutions
Revenues	2,331,030	2,082,321	1,815,933
Specialty Technology Solutions | Operating Segments
Revenues	2,331,030	2,082,321	1,815,933
Depreciation and amortization	10,838	11,754	13,193
Change in fair value of contingent consideration	0	0	0
Operating income	75,688	66,686	29,566
Capital expenditures	(3,966)	(1,667)	(1,282)
Modern Communications & Cloud
Revenues	1,456,691	1,447,614	1,334,873
Modern Communications & Cloud | Operating Segments
Revenues	1,456,691	1,447,614	1,334,873
Depreciation and amortization	14,901	15,110	17,287
Change in fair value of contingent consideration	0	0	516
Operating income	61,658	55,511	43,551
Capital expenditures	$ (6,013)	$ (5,182)	$ (1,067)