Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Federal statutory rate, blended rate for next fiscal year	28.00%		28.00%
Federal statutory rate in periods subsequent to next fiscal year	21.00%		21.00%
Deferred tax assets, effect of Tax Cuts and Jobs Act, tax expense (benefit)			$ 1,286
Provisional tax expense for foreign tax credits	$ 415
Income tax (benefit) expense	1,335	$ 1,779	(7,046)	$ 520
(Loss) income from operations before income taxes	10,468	6,983	20,040	9,543
Excess tax benefits on stock-based compensation	$ 294	$ 634	7,579	$ 2,817
Operating loss carryforward, increase in carrying value			$ 3,716