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Derivative Financial Instruments - Pretax Effect of Derivative Instruments on Earnings and OCI (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Derivative Instruments, Gain (Loss) [Line Items]    
Net gains (losses) recognized in other comprehensive income (effective portion) $ 3,332 $ (3,125)
Net losses recognized in earnings (ineffective portion) (51) (507)
Derivative Instruments Designated as Cash Flow Hedges
   
Derivative Instruments, Gain (Loss) [Line Items]    
Net gains (losses) recognized in earnings (effective portion) $ 4,710 $ (2,219)