INTANGIBLE ASSETS - Schedule of Intangible Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Finite Lived Intangible Assets [Line Items]
Intangible assets	$ 669,248	$ 668,772
Accumulated amortization	(433,877)	(393,400)
Total intangible assets, net	235,371	275,372
Customer contracts and related customer relationships
Finite Lived Intangible Assets [Line Items]
Intangible assets	635,895	635,826
Accumulated amortization	(402,934)	(363,412)
Acquired technologies
Finite Lived Intangible Assets [Line Items]
Intangible assets	28,503	28,074
Accumulated amortization	(26,542)	(25,693)
Covenants not to compete
Finite Lived Intangible Assets [Line Items]
Intangible assets	3,305	3,321
Accumulated amortization	(3,288)	(3,245)
Other
Finite Lived Intangible Assets [Line Items]
Intangible assets	1,545	1,551
Accumulated amortization	$ (1,113)	$ (1,050)