Annual report pursuant to Section 13 and 15(d)

Derivative Instruments and Hedging Transactions - Summary of Net Gains (Losses) on Derivative Instruments (Details)

v3.20.2
Derivative Instruments and Hedging Transactions - Summary of Net Gains (Losses) on Derivative Instruments (Details) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Derivative [Line Items]    
Gains (losses) on derivative instruments: $ 8,058 $ (1,068)
Future commodity and forward contracts    
Derivative [Line Items]    
Unrealized gains (losses) on open future commodity and forward contracts and open sale and purchase commitments, net 37,163 (126)
Commodity Contract    
Derivative [Line Items]    
Realized losses on future commodity contracts, net $ (29,105) $ (942)