Goodwill and Intangible Assets - Future Annual Amortization Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Jun. 30, 2018
Goodwill and Intangible Assets
Amortization expense	$ 7,900	$ 8,300	$ 24,300	$ 24,600
Future annual amortization expense:
2019	7,808		7,808
2020	31,232		31,232
2021	31,232		31,232
2022	31,232		31,232
2023	31,232		31,232
Thereafter	232,788		232,788
Intangible assets, net	$ 365,524		$ 365,524		$ 387,976