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Fair Value Measurements (Details 3) - USD ($)
$ in Thousands
Jun. 30, 2015
Jun. 30, 2014
Prepaid Expenses and Other Current Assets [Member]    
Derivatives, Fair Value [Line Items]    
Unrealized gains on interest rate swaps $ 0 $ 19
Accrued Expenses and Other Current Liabilities [Member]    
Derivatives, Fair Value [Line Items]    
Unrealized losses on interest rate swaps $ (3,430) $ (2,086)