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
	Sep. 30, 2018	Sep. 30, 2017
Net income	$ 38,066	$ 34,755
Weighted average shares outstanding (in shares)	70,988	73,024
Dilutive impact from:
Share-based payment awards (in shares)	1,027
Dilutive weighted average shares outstanding (in shares)	72,015	73,609
Income per share
Basic (in dollars per share)	$ 0.54	$ 0.48
Dilutive (in dollars per share)	$ 0.53	$ 0.47
Accounting Standards Update 2014-09 [Member]
Net income		$ 40,521
Weighted average shares outstanding (in shares)		73,024
Dilutive impact from:
Share-based payment awards (in shares)		585
Dilutive weighted average shares outstanding (in shares)		73,609
Income per share
Basic (in dollars per share)		$ 0.55
Dilutive (in dollars per share)		$ 0.55