Intangible Assets - Estimated Future Amortization Expense for Acquired Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Finite-Lived Intangible Assets, Gross	$ 243,488	$ 168,694
Finite-Lived Intangible Assets, Accumulated Amortization	65,584	39,657
2015	25,372
2016	21,524
2017	20,867
2018	20,771
2019	18,789
Thereafter	70,581
Net Carrying Amount	177,904	129,037
Customer Relationships
Finite-Lived Intangible Assets, Gross	171,940	117,630
Finite-Lived Intangible Assets, Accumulated Amortization	46,505	31,533
Net Carrying Amount	$ 125,435	$ 86,097
Acquired intangible assets, estimated useful lives	10 years 8 months	10 years
Completed Technology [Member]
Finite-Lived Intangible Assets, Gross	$ 62,392	$ 44,503
Finite-Lived Intangible Assets, Accumulated Amortization	13,101	6,079
Net Carrying Amount	$ 49,291	$ 38,424
Acquired intangible assets, estimated useful lives	8 years 1 month	7 years 10 months 24 days
Backlog [Member]
Finite-Lived Intangible Assets, Gross	$ 7,650	$ 5,430
Finite-Lived Intangible Assets, Accumulated Amortization	5,338	1,768
Net Carrying Amount	$ 2,312	$ 3,662
Acquired intangible assets, estimated useful lives	1 year 7 months	2 years