Quarterly report pursuant to Section 13 or 15(d)

Derivative Instrument and Hedging Transactions (Offsetting Assets and Liabilities) (Details)

v3.4.0.3
Derivative Instrument and Hedging Transactions (Offsetting Assets and Liabilities) (Details) - USD ($)
$ in Thousands
Mar. 31, 2016
Jun. 30, 2015
Offsetting Assets and Liabilities [Line Items]    
Gross derivative receivable $ 12,376 $ 18,253
Amounts netted (1,290) (6,889)
Net derivative receivable 11,086 11,364
Gross derivative payable 16,539 24,153
Amounts netted (1,341) (734)
Cash collateral pledge (4,125) (5,522)
Net derivative payables 11,073 17,897
Open sales and purchase commitments    
Offsetting Assets and Liabilities [Line Items]    
Gross derivative receivable 11,124 2,815
Amounts netted (1,290) (1,093)
Net derivative receivable 9,834 1,722
Gross derivative payable 1,500 11,723
Amounts netted (1,341) (734)
Cash collateral pledge 0 0
Net derivative payables 159 10,989
Margin accounts    
Offsetting Assets and Liabilities [Line Items]    
Gross derivative payable 10,913 12,430
Amounts netted 0 0
Cash collateral pledge (4,125) (5,522)
Net derivative payables 6,788 6,908
Future contracts    
Offsetting Assets and Liabilities [Line Items]    
Gross derivative receivable 1,226 11,159
Amounts netted 0 (5,796)
Net derivative receivable 1,226 5,363
Gross derivative payable 1,163 0
Amounts netted 0 0
Net derivative payables 1,163 0
Forward contracts    
Offsetting Assets and Liabilities [Line Items]    
Gross derivative receivable 26 4,279
Amounts netted 0 0
Net derivative receivable 26 4,279
Gross derivative payable 2,963 0
Amounts netted 0 0
Cash collateral pledge 0 0
Net derivative payables $ 2,963 $ 0