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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

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