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Fair Value Measurement (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Jun. 30, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mutual funds	$ 12,719	$ 17,227
Mutual funds, fair value	12,719	17,227
Held-to-maturity securities, maturities less than 1 year	253
Held-to-maturity securities, maturities less than 1 year, fair value	251
Held-to-maturity securities, remaining maturities from 1-3 years	3,257	2,073
Held-to-maturity securities, remaining maturities from 1-3 years, fair value	3,250	2,057
Held-to-maturity securities, remaining maturities from 3-5 years		1,453
Held-to-maturity securities, remaining maturities from 3-5 years, fair value		1,438
Held-to-maturity securities, maturities from 1-90 days	747	1,496
Held-to-maturity securities, maturities from 1-90 days, fair value	747	1,496
Held-to-maturity securities, maturities from 91-360 days	3,939	4,438
Held-to-maturity securities, maturities from 91-360 days, fair value	3,943	4,440
Held-to-maturity securities, maturities over 360 days	1,047	4,990
Held-to-maturity securities, maturities over 360 days, fair value	1,048	4,993
Investments	21,962	31,677
Investments, fair value	21,958	31,651
Fair Value Inputs Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mutual funds, fair value	12,719	17,227
Investments, fair value	12,719	17,227
Fair Value Inputs Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Held-to-maturity securities, maturities less than 1 year, fair value	251
Held-to-maturity securities, remaining maturities from 1-3 years, fair value	3,250	2,057
Held-to-maturity securities, remaining maturities from 3-5 years, fair value		1,438
Held-to-maturity securities, maturities from 1-90 days, fair value	747	1,496
Held-to-maturity securities, maturities from 91-360 days, fair value	3,943	4,440
Held-to-maturity securities, maturities over 360 days, fair value	1,048	4,993
Investments, fair value	$ 9,239	$ 14,424

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Fair value of held-to-maturity debt securities maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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