Annual report pursuant to Section 13 and 15(d)

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

v3.5.0.2
Derivative Instrument and Hedging Transactions (Offsetting Assets and Liabilities) (Details) - USD ($)
$ in Thousands
Jun. 30, 2016
Jun. 30, 2015
Offsetting Assets and Liabilities [Line Items]    
Gross derivative receivable $ 38,763 $ 18,253
Amounts netted (5,031) (6,889)
Net derivative receivable 33,732 11,364
Gross derivative payable 43,870 24,153
Amounts netted (3,159) (734)
Cash collateral pledge (4,257) (5,522)
Net derivative payables 36,454 17,897
Open sale and purchase commitments    
Offsetting Assets and Liabilities [Line Items]    
Gross derivative receivable 37,378 2,815
Amounts netted (5,031) (1,093)
Net derivative receivable 32,347 1,722
Gross derivative payable 2,938 11,723
Amounts netted (1,019) (734)
Cash collateral pledge 0 0
Net derivative payables 1,919 10,989
Margin accounts    
Offsetting Assets and Liabilities [Line Items]    
Gross derivative payable 12,439 12,430
Amounts netted 0 0
Cash collateral pledge (4,257) (5,522)
Net derivative payables 8,182 6,908
Future contracts    
Offsetting Assets and Liabilities [Line Items]    
Gross derivative receivable 0 11,159
Amounts netted 0 (5,796)
Net derivative receivable 0 5,363
Gross derivative payable 13,914 0
Amounts netted 0 0
Net derivative payables 13,914 0
Forward contracts    
Offsetting Assets and Liabilities [Line Items]    
Gross derivative receivable 1,385 4,279
Amounts netted 0 0
Net derivative receivable 1,385 4,279
Gross derivative payable 14,579 0
Amounts netted (2,140) 0
Cash collateral pledge 0 0
Net derivative payables $ 12,439 $ 0