Business Segment Information - Summarized Financial Information of Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Revenue from external customers	$ 1,264,958	$ 1,124,100	$ 3,612,463	$ 3,297,774
Net income	68,145	64,499	215,574	249,340
Domestic Operations
Segment Reporting Information [Line Items]
Revenue from external customers	1,225,531	1,079,953	3,494,606	3,177,659
Net income	63,759	60,779	203,765	238,542
International Operations
Segment Reporting Information [Line Items]
Revenue from external customers	39,427	44,147	117,857	120,115
Net income	$ 4,386	$ 3,720	$ 11,809	$ 10,798