Goodwill and Other Intangible Assets - Schedule of Intangible Assets Subject to Amortization and for Intangible Assets Not Subject to Amortization (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Jun. 30, 2017
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 440,374	$ 412,921
Accumulated Amortization	(270,520)	(241,641)
Net Carrying Value	169,854	171,280
Goodwill	205,362	194,700
Total intangible assets	375,216	365,980
Customer Related [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	206,583	190,965
Accumulated Amortization	(134,470)	(122,698)
Net Carrying Value	$ 72,113	$ 68,267
Weighted Average Remaining Life	8 years 7 months 6 days	8 years 8 months 12 days
Core Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 131,630	$ 130,572
Accumulated Amortization	(81,850)	(74,452)
Net Carrying Value	$ 49,780	$ 56,120
Weighted Average Remaining Life	8 years 3 months 19 days	8 years 9 months 18 days
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 22,304	$ 20,591
Accumulated Amortization	(17,065)	(15,691)
Net Carrying Value	$ 5,239	$ 4,900
Weighted Average Remaining Life	5 years 4 months 24 days	6 years 7 months 6 days
Software Developed Other Than For Internal Use [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 18,796	$ 16,304
Accumulated Amortization	(5,495)	(3,423)
Net Carrying Value	$ 13,301	$ 12,881
Weighted Average Remaining Life	4 years 3 months 19 days	5 years
Software [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 61,061	$ 54,489
Accumulated Amortization	(31,640)	(25,377)
Net Carrying Value	$ 29,421	$ 29,112
Weighted Average Remaining Life	4 years 7 months 6 days	3 years 6 months