Debt (Debt Issuance Costs) (Detail) $ in Thousands	6 Months Ended
	Dec. 31, 2020 USD ($)
Deferred Debt Issuance Costs at June 30, 2020	$ 6,401
Deferred Debt Issuance Costs For Credit Agreement	1,722
Amortization of Deferred Debt Issuance Costs	(828)
Deferred debt issuance costs as of September 30, 2020	7,295
Term B Loan [Member]
Deferred Debt Issuance Costs at June 30, 2020	4,885
Deferred Debt Issuance Costs For Credit Agreement	1,015
Amortization of Deferred Debt Issuance Costs	(531)
Deferred debt issuance costs as of September 30, 2020	5,369
Revolver [Member]
Deferred Debt Issuance Costs at June 30, 2020	1,516
Deferred Debt Issuance Costs For Credit Agreement	707
Amortization of Deferred Debt Issuance Costs	(297)
Deferred debt issuance costs as of September 30, 2020	$ 1,926