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, 2025	Dec. 31, 2024	Sep. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Mar. 31, 2025	Mar. 31, 2024
Numerator:
Net income	$ 365,041	$ 344,622	$ 311,355	$ 300,492	$ 208,800	$ 219,422	$ 1,021,018	$ 728,715
Denominator:
Basic weighted-average common shares outstanding (in shares)	146,719			146,959			146,797	147,056
Effect of dilutive securities:
Stock options and restricted stock units (in shares)	501			491			635	493
Diluted weighted average shares (in shares)	147,220			147,450			147,432	147,549
Basic earnings per share (in dollars per share)	$ 2.49			$ 2.04			$ 6.96	$ 4.96
Diluted earnings per share (in dollars per share)	$ 2.48			$ 2.04			$ 6.93	$ 4.94