Accrued Warranties - Schedule of Accrued Warranties (Detail) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Commitments And Contingencies Disclosure [Abstract]
Accrued warranties, beginning of year	$ 178,367	$ 163,331
Warranty expense	24,341	17,066
Warranty payments (cash or in-kind)	(20,892)	(11,648)
Other	3,308	802
Accrued warranties, end of year	$ 185,124	$ 169,551