Restatement of Previously Issued Financial Statements (Condensed consolidated balance sheet, including balances originally reported, corrections and restated balances) (Detail) - USD ($) $ in Thousands	Mar. 31, 2018		Jun. 30, 2017
Assets
Deferred income tax asset, net	$ 0
Total assets	761,191	[1]	$ 1,038,185
Liabilities and Shareholders' Equity
Deferred income tax liability	1,261	[1]	7,325
Total liabilities	629,159	[1]	633,118
Retained deficit	(91,704)	[1]	195,680
Total shareholders' equity	132,032	[1]	405,067
Total liabilities and shareholders' equity	761,191	[1]	$ 1,038,185
As Reported
Assets
Deferred income tax asset, net	70,089
Total assets	831,280
Liabilities and Shareholders' Equity
Deferred income tax liability	0
Total liabilities	627,898
Retained deficit	(20,354)
Total shareholders' equity	203,382
Total liabilities and shareholders' equity	831,280
Adjustment
Assets
Deferred income tax asset, net	(70,089)
Total assets	(70,089)
Liabilities and Shareholders' Equity
Deferred income tax liability	1,261
Total liabilities	1,261
Retained deficit	(71,350)
Total shareholders' equity	(71,350)
Total liabilities and shareholders' equity	$ (70,089)

[1] (as restated)