Intangible Assets - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	[1]	Jun. 30, 2018
Finite Lived Intangible Assets [Line Items]
Intangible assets	$ 458,542		$ 449,974
Less accumulated amortization	(217,898)		(208,219)
Total intangible assets, net	240,644		241,755
Customer contracts and related customer relationships
Finite Lived Intangible Assets [Line Items]
Intangible assets	444,528		435,933
Less accumulated amortization	(208,313)		(199,018)
Acquired technologies
Finite Lived Intangible Assets [Line Items]
Intangible assets	13,210		13,237
Less accumulated amortization	(9,126)		(8,761)
Other
Finite Lived Intangible Assets [Line Items]
Intangible assets	804		804
Less accumulated amortization	$ (459)		$ (440)

[1] During the three months ended September 30, 2018, the Company removed $0.1 million in fully amortized intangible assets.