Debt - Additional Information (Detail) $ in Thousands	6 Months Ended
	Dec. 31, 2018 USD ($) Rate	Jun. 30, 2018 USD ($)
Credit Agreement Terms
Senior secured revolving credit facility | $	$ 300,000	$ 300,000
Line Of Credit Facility Expiration Date	Feb. 08, 2022
Senior Leverage Ratio, Maximum	3.00
Senior Leverage Ratio, Minimum	1.00
Fixed Charge Coverage Ratio, Maximum	1.25
Fixed Charge Coverage Ratio, Minimum	1.00
Amount of Limit on Asset Dispositions | $	$ 20,000
Additional Margin on alternate base rate loans, Minimum	0.625%
Additional Margin on alternate base rate loans, Maximum	1.625%
Sublimit on Australian Dollar, Canadian Dollar, Euro and Pounds Sterling | $	$ 75,000
Sub-limit on letters of credit under the credit facility | $	$ 200,000
Additional Margin on Adjusted LIBO, EURIBO and CDOR loans, Minimum	1.625%
Additional Margin on Adjusted LIBO, EURIBO and CDOR loans, Maximum	2.625%
Additional Margin on Canadian prime rate loans, Minimum	2.125%
Additional Margin on Canadian prime rate loans, Maximum	3.125%
Consolidated EBITDA as defined in the Credit Agreement | $	$ 31,500
Consolidated funded indebtedness | $	$ 28,700
Minimum [Member]
Credit Agreement Terms
Unused Credit Facility Fee	0.25%
Maximum [Member]
Credit Agreement Terms
Unused Credit Facility Fee	0.45%