Quarterly report pursuant to Section 13 or 15(d)

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

v3.3.0.814
Derivative Instrument and Hedging Transactions (Outstanding Commitments) (Details) - USD ($)
$ in Thousands
Sep. 30, 2015
Jun. 30, 2015
Derivative [Line Items]    
Purchase commitments $ 556,388 $ 444,023
Sale commitments (477,089) (249,081)
Margin sales commitments (11,436) (12,430)
Open derivative contracts 258,025 310,316
Precious metals forward contracts at market values    
Derivative [Line Items]    
Open derivative contracts 123,658 202,323
Future contracts    
Derivative [Line Items]    
Open derivative contracts $ 134,367 $ 107,993