Segment Information (Revenues and Long-Lived Assets by Geographic Area) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Total Consolidated Revenue	$ 271,487	$ 258,703	$ 792,272	$ 749,603
Total Consolidated Long-lived Assets	371,171	333,773	371,171	333,773
Domestic Operations [Member]
Segment Reporting Information [Line Items]
Total Consolidated Revenue	176,946	160,949	507,482	468,788
Total Consolidated Long-lived Assets	208,812	156,881	208,812	156,881
Barbados, Dominica, St. Kitts and St. Maarten [Member]
Segment Reporting Information [Line Items]
Total Consolidated Revenue	92,259	95,366	277,934	274,207
Total Consolidated Long-lived Assets	160,552	174,827	160,552	174,827
Other International Operations [Member]
Segment Reporting Information [Line Items]
Total Consolidated Revenue	2,282	2,388	6,856	6,608
Total Consolidated Long-lived Assets	1,807	2,065	1,807	2,065
International Operations [Member]
Segment Reporting Information [Line Items]
Total Consolidated Revenue	94,541	97,754	284,790	280,815
Total Consolidated Long-lived Assets	$ 162,359	$ 176,892	$ 162,359	$ 176,892