Intangible Assets - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	[1]	Jun. 30, 2017
Finite Lived Intangible Assets [Line Items]
Intangible assets	$ 446,665		$ 669,248
Less accumulated amortization	(202,593)		(433,877)
Total intangible assets, net	244,072		235,371
Customer contracts and related customer relationships
Finite Lived Intangible Assets [Line Items]
Intangible assets	431,973		635,895
Less accumulated amortization	(194,166)		(402,934)
Acquired technologies
Finite Lived Intangible Assets [Line Items]
Intangible assets	13,888		28,503
Less accumulated amortization	(8,025)		(26,542)
Covenants not to compete
Finite Lived Intangible Assets [Line Items]
Intangible assets			3,305
Less accumulated amortization			(3,288)
Other
Finite Lived Intangible Assets [Line Items]
Intangible assets	804		1,545
Less accumulated amortization	$ (402)		$ (1,113)

[1] During the six months ended December 31, 2017, the Company wrote off $250.7 million in fully amortized intangible assets.