Debt - Additional Information (Detail) - USD ($)		3 Months Ended		9 Months Ended
	Jun. 27, 2017	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017	Jun. 30, 2017
Debt Instrument [Line Items]
Long-term debt		$ 195,000,000		$ 195,000,000		$ 0
Interest expense		999,000	$ 1,893,000	1,101,000	$ 5,613,000
Amount of outstanding letter of credit		2,771,000		2,771,000
Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 400,000,000
Debt instrument term	5 years
Proceeds from lines of credit				195,000,000
Long-term debt		195,000,000		195,000,000
Interest expense		999,000		1,101,000
Term Loan
Debt Instrument [Line Items]
Debt issuance costs		$ 5,659,000		$ 5,659,000