Quarterly report pursuant to Section 13 or 15(d)

Derivative Instrument and Hedging Transactions (Outstanding Commitments) (Details)

v3.4.0.3
Derivative Instrument and Hedging Transactions (Outstanding Commitments) (Details) - USD ($)
$ in Thousands
Mar. 31, 2016
Jun. 30, 2015
Derivative [Line Items]    
Purchase commitments $ 436,000 $ 444,023
Sale commitments (248,658) (249,081)
Margin sales commitments (10,913) (12,430)
Open derivative contracts 343,106 310,316
Forward contracts    
Derivative [Line Items]    
Open derivative contracts 217,961 202,323
Future contracts    
Derivative [Line Items]    
Open derivative contracts $ 125,145 $ 107,993