Quarterly report pursuant to Section 13 or 15(d)

Hedging Transactions (Offsetting Assets and Liabilities) (Details)

v2.4.0.8
Hedging Transactions (Offsetting Assets and Liabilities) (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Jun. 30, 2014
Offsetting Assets and Liabilities [Line Items]    
Net derivative receivable $ 46,200 $ 22,200
Counterparty
    
Offsetting Assets and Liabilities [Line Items]    
Gross derivative receivable 47,759 26,296
Amounts netted (1,550) (4,112)
Net derivative receivable 46,209 22,184
Gross derivative payable 60,378 16,525
Amount netted (629) (174)
Cash collateral pledge (5,277) 16,431
Net derivative payables 54,472 32,782
Counterparty | Open sales and purchase commitments
    
Offsetting Assets and Liabilities [Line Items]    
Gross derivative receivable 4,178 26,282
Amounts netted (1,550) (4,112)
Net derivative receivable 2,628 22,170
Gross derivative payable 49,768 1,022
Amount netted (629) (174)
Cash collateral pledge 0 0
Net derivative payables 49,139 848
Counterparty | Margin accounts
    
Offsetting Assets and Liabilities [Line Items]    
Gross derivative payable 10,610 15,751
Amount netted 0 0
Cash collateral pledge (5,277) (6,768)
Net derivative payables 5,333 8,983
Counterparty | Future contracts
    
Offsetting Assets and Liabilities [Line Items]    
Gross derivative receivable 27,071 0
Amounts netted 0 0
Net derivative receivable 27,071 0
Gross derivative payable 0 (15,121)
Amount netted 0 0
Cash collateral pledge    23,199
Net derivative payables 0 8,078
Counterparty | Forward contracts
    
Offsetting Assets and Liabilities [Line Items]    
Gross derivative receivable 16,510 14
Amounts netted 0 0
Net derivative receivable 16,510 14
Gross derivative payable 0 14,873
Amount netted 0 0
Cash collateral pledge 0 0
Net derivative payables $ 0 $ 14,873