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Fair Value Disclosure - Long-term Investments (Details) - Fair Value, Measurements, Recurring - USD ($)
$ in Thousands
Sep. 30, 2016
Jun. 30, 2016
Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Short-term and long-term debt $ 98,195 $ 93,589
Auction rate securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Amortized Cost 2,750 2,750
Gross Unrealized Holding Gains 0 0
Gross Unrealized Holding Losses (107) (107)
Fair Value 2,643 2,643
Auction rate securities | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value $ 0 $ 0