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Fair Value Measurements (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Jun. 30, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Short-term Investments $ 24,000 $ 50,000
Interest rate swap 0 5,078
Level 1    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Short-term Investments 24,000 50,000
Derivatives asset (liability) 0 0
Interest rate swap 0 0
Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Short-term Investments 0 0
Derivatives asset (liability) 383 71
Interest rate swap   $ 5,078
Interest rate swap (liability) $ (977)