Investments - Carrying Value (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Jun. 30, 2015
Schedule of Held-to-maturity Securities [Line Items]
Mutual Funds Carrying Value	$ 12,703	$ 17,227
Available-for-sale securities, current	12,703	17,227
Held-to-maturity securities, maturities from 1-90 days	1,753	1,496
Held-to-maturity securities, maturities from 91-360 days	3,736	4,438
Held-to-maturity securities, maturities over 360 days	2,248	4,990
Held-to-maturity securities, remaining maturities from 1-3 years	2,800	2,073
Held-to-maturity securities, remaining maturities from 3-5 years	720	1,453
Held-to-maturity securities	11,257	14,450
Short-Term Investments
Schedule of Held-to-maturity Securities [Line Items]
Total available-for-sale and held-to-maturity securities	18,192	23,161
Long-Term Investments
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity securities	5,768	8,516
Mutual Funds - Corporate & Government Debt
Schedule of Held-to-maturity Securities [Line Items]
Mutual Funds Carrying Value	12,703
Available-for-sale securities, current	12,703	17,227
Time Deposits
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity securities	7,737	10,924
Time Deposits | Short-Term Investments
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity securities, maturities from 1-90 days	1,753	1,496
Held-to-maturity securities, maturities from 91-360 days	3,736	4,438
Time Deposits | Long-Term Investments
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity securities, maturities over 360 days	2,248	4,990
Fixed Income Bonds
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity securities	3,520	3,526
Fixed Income Bonds | Long-Term Investments
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity securities, remaining maturities from 1-3 years	2,800	2,073
Held-to-maturity securities, remaining maturities from 3-5 years	$ 720	$ 1,453