Segment and Geographic Information - Summary of Segments' Profits (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Summary of operating segments
Segment revenue	$ 125,960	$ 125,871	$ 124,902	$ 122,781	$ 123,682	$ 119,277	$ 119,933	$ 120,050	$ 499,514	$ 482,942	$ 472,344
Income from operations	$ 50,706	$ 51,157	$ 54,465	$ 53,313	$ 48,948	$ 52,273	$ 56,065	$ 54,730	209,641	212,016	211,381
Operating Segments
Summary of operating segments
Segment revenue									499,514	482,942	472,344
Segment expenses									(233,797)	(219,629)	(207,299)
Income from operations									265,717	263,313	265,045
Operating Segments | Subscription and software
Summary of operating segments
Segment revenue									471,041	453,512	440,408
Segment expenses									(206,381)	(193,214)	(179,064)
Income from operations									264,660	260,298	261,344
Operating Segments | Services
Summary of operating segments
Segment revenue									28,473	29,430	31,936
Segment expenses									(27,416)	(26,415)	(28,235)
Income from operations									$ 1,057	$ 3,015	$ 3,701