Accrued Warranties - Schedule of Accrued Warranties (Detail) - USD ($) $ in Thousands	6 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Commitments And Contingencies Disclosure [Abstract]
Accrued warranties, beginning of year	$ 178,367	$ 163,331
Warranty expense	47,089	31,647
Warranty payments (cash or in-kind)	(32,106)	(26,005)
Other	(7,694)	(4,226)
Accrued warranties, end of year	$ 185,656	$ 164,747