Quarterly report pursuant to Section 13 or 15(d)

Hedging Transactions (Outstanding Commitments) (Details)

v2.4.0.8
Hedging Transactions (Outstanding Commitments) (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Jun. 30, 2014
Derivative [Line Items]    
Purchase commitments $ 429,522 $ 489,944
Sale commitments (145,283) (190,108)
Margin sales commitments (10,610) (15,751)
Open derivative contracts 363,801 427,039
Precious metals forward contracts at market values
    
Derivative [Line Items]    
Open derivative contracts 158,770 206,055
Future contracts
    
Derivative [Line Items]    
Open derivative contracts $ 205,031 $ 220,984