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Employee Benefit Plans - Sensitivity in Results (Details)
$ in Thousands
12 Months Ended
Jun. 30, 2015
USD ($)
Compensation and Retirement Disclosure [Abstract]  
Defined Benefit Plan, Effect of One Percentage Point Decrease on Service and Interest Cost Components $ (276)
Effect on total service and interest cost components (335)
Defined Benefit Plan, Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation (1,925)
Effect on accumulated postretirement benefit obligation $ (2,324)