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Investments - Carrying Value (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Jun. 30, 2015
Schedule of Held-to-maturity Securities [Line Items]
Available-for-sale securities, current	$ 12,719	$ 17,227
Held-to-maturity securities, maturities from 1-90 days	747	1,496
Held-to-maturity securities, maturities from 91-360 days	3,939	4,438
Held-to-maturity securities, maturities over 360 days	1,047	4,990
Held-to-maturity securities, maturities less than 1 year	253
Held-to-maturity securities, remaining maturities from 1-3 years	3,257	2,073
Held-to-maturity securities, remaining maturities from 3-5 years		1,453
Held-to-maturity securities	9,243	14,450
Short-Term Investments
Schedule of Held-to-maturity Securities [Line Items]
Total available-for-sale and held-to-maturity securities	17,658	23,161
Long-Term Investments
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity securities	4,304	8,516
Mutual Funds - Corporate & Government Debt
Schedule of Held-to-maturity Securities [Line Items]
Available-for-sale securities, current	12,719	17,227
Mutual Funds - Corporate & Government Debt | Short-Term Investments
Schedule of Held-to-maturity Securities [Line Items]
Available-for-sale securities, current	12,719	17,227
Time Deposits
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity securities	5,733	10,924
Time Deposits | Short-Term Investments
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity securities, maturities from 1-90 days	747	1,496
Held-to-maturity securities, maturities from 91-360 days	3,939	4,438
Time Deposits | Long-Term Investments
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity securities, maturities over 360 days	1,047	4,990
Fixed Income Bonds
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity securities	3,510	3,526
Fixed Income Bonds | Short-Term Investments
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity securities, maturities less than 1 year	253
Fixed Income Bonds | Long-Term Investments
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity securities, remaining maturities from 1-3 years	$ 3,257	2,073
Held-to-maturity securities, remaining maturities from 3-5 years		$ 1,453

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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