Financial Instruments - Summary of financial assets and liabilities that were measured at fair value on a recurring basis (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Jun. 30, 2020
Assets:
Equity securities	$ 20,517	$ 7,901
Derivatives	5,486	7,561
Liabilities:
Derivatives	82,134	34,995
Quoted Prices In Active Markets (Level 1)
Assets:
Equity securities	20,517	7,901
Derivatives	0	0
Liabilities:
Derivatives	0	0
Significant Other Observable Inputs (Level 2)
Assets:
Equity securities	0	0
Derivatives	5,486	7,561
Liabilities:
Derivatives	82,134	34,995
Significant Unobservable Inputs (Level 3)
Assets:
Equity securities	0	0
Derivatives	0	0
Liabilities:
Derivatives	$ 0	$ 0