Segment Information (Revenues and Long-Lived Assets by Geographic Area) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Total Consolidated Revenue	$ 266,172	$ 253,961	$ 520,785	$ 490,900
Total Consolidated Long-lived Assets	364,825	333,289	364,825	333,289
Domestic Operations [Member]
Segment Reporting Information [Line Items]
Total Consolidated Revenue	169,140	161,176	330,535	307,839
Total Consolidated Long-lived Assets	200,257	159,069	200,257	159,069
Barbados, Dominica, St. Kitts and St. Maarten [Member]
Segment Reporting Information [Line Items]
Total Consolidated Revenue	94,705	90,394	185,675	178,841
Total Consolidated Long-lived Assets	162,813	172,065	162,813	172,065
Other International Operations [Member]
Segment Reporting Information [Line Items]
Total Consolidated Revenue	2,327	2,391	4,575	4,220
Total Consolidated Long-lived Assets	1,755	2,155	1,755	2,155
International Operations [Member]
Segment Reporting Information [Line Items]
Total Consolidated Revenue	97,032	92,785	190,250	183,061
Total Consolidated Long-lived Assets	$ 164,568	$ 174,220	$ 164,568	$ 174,220