Business Segment Information - Summarized Financial Information of Reportable Segments (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]
Revenue from external customers	$ 1,395,469	$ 1,181,641	$ 2,758,861	$ 2,347,505
Net income	79,195	68,596	147,172	147,429
Domestic Operations
Segment Reporting Information [Line Items]
Revenue from external customers	1,353,793	1,142,552	2,678,566	2,269,075
Net income	74,684	64,557	138,895	140,006
International Operations
Segment Reporting Information [Line Items]
Revenue from external customers	41,676	39,089	80,295	78,430
Net income	$ 4,511	$ 4,039	$ 8,277	$ 7,423