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Deferred Compensation Plan - Investments (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Jun. 30, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Amortized Cost $ 644 $ 644
Unrealized Gains 97 40
Unrealized Losses 0 0
Fair Value 741 684
Mutual funds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Amortized Cost 644 644
Unrealized Gains 97 40
Unrealized Losses 0 0
Fair Value $ 741 $ 684