Investments - Carrying Value (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Schedule of Held-to-maturity Securities [Line Items]
Short-Term Investments	$ 10,900	$ 17,102
Long-Term Investments	1,990	4,208
Mutual Funds - Corporate & Government Debt
Schedule of Held-to-maturity Securities [Line Items]
Short-Term Investments	9,043	12,807
Long-Term Investments	0	0
Time Deposits | Maturities from 1-90 days
Schedule of Held-to-maturity Securities [Line Items]
Short-Term Investments	0	2,243
Long-Term Investments	0	0
Time Deposits | Maturities from 91-360 days
Schedule of Held-to-maturity Securities [Line Items]
Short-Term Investments	250	1,699
Long-Term Investments	0	0
Time Deposits | Maturities over 360 days
Schedule of Held-to-maturity Securities [Line Items]
Short-Term Investments	0	0
Long-Term Investments	549	1,048
Fixed Income Bonds | Maturities less than 1 year
Schedule of Held-to-maturity Securities [Line Items]
Short-Term Investments	1,607	353
Long-Term Investments	0	0
Fixed Income Bonds | Maturities from 1-3 years
Schedule of Held-to-maturity Securities [Line Items]
Short-Term Investments	0	0
Long-Term Investments	$ 1,441	$ 3,160