Revenue recognition - Contract assets and liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Jun. 30, 2021
Revenue from Contract with Customer [Abstract]
Contract assets, current (included within Prepaid expenses and other)	$ 25,936	$ 34,190
Contract assets, noncurrent (included within Investments and other assets)	2,471	1,884
Total contract assets	28,407	36,074
Contract liabilities, current (included within Other accrued liabilities)	(45,439)	(51,211)
Contract liabilities, noncurrent (included within Other liabilities)	(2,250)	(3,080)
Total contract liabilities	(47,689)	(54,291)
Net contract liabilities	$ (19,282)	$ (18,217)