Net Income Per Share - Calculations of Basic and Diluted Net Income per Share and Basic and Dilutive Weighted Average Shares Outstanding (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Mar. 31, 2022	Mar. 31, 2021
Net income	$ 75,123	$ 61,864	$ 39,399	$ 62,495	$ 129,152	$ 32,711	$ 176,386	$ 224,358
Weighted average shares outstanding (in shares)	66,594			67,920			66,791	67,809
Dilutive impact from:
Employee equity awards (in shares)	420			688			450	630
Dilutive weighted average shares outstanding (in shares)	67,014			68,608			67,241	68,439
Income per share
Basic (in dollars per share)	$ 1.13			$ 0.92			$ 2.64	$ 3.31
Dilutive (in dollars per share)	$ 1.12			$ 0.91			$ 2.62	$ 3.28