Earnings Per Share - Schedule of Basic And Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Mar. 31, 2024	Mar. 31, 2023
Numerator:
Net income	$ 300,492	$ 208,800	$ 219,422	$ 232,500	$ 224,914	$ 210,478	$ 728,715	$ 667,892
Denominator:
Basic weighted-average common shares outstanding	146,959			146,914			147,056	146,681
Effect of dilutive securities:
Stock options and restricted stock units	491			481			493	719
Diluted weighted average shares	147,450			147,395			147,549	147,400
Basic earnings per share (in dollars per share)	$ 2.04			$ 1.58			$ 4.96	$ 4.55
Diluted earnings per share (in dollars per share)	$ 2.04			$ 1.58			$ 4.94	$ 4.53