Goodwill and intangible assets - Additional information (Details) $ in Thousands	3 Months Ended
	Sep. 30, 2019 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible amortization expense	$ 51,106
Estimated amortization expense, year ending June 30, 2019	215,970
Estimated amortization expense, year ending June 30, 2020	222,107
Estimated amortization expense, year ending June 30, 2021	216,099
Estimated amortization expense, year ending June 30, 2022	205,156
Estimated amortization expense, year ending June 30, 2023	$ 199,597