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Fair Value Measurement (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Jun. 30, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mutual funds	$ 12,848	$ 12,807
Mutual funds, fair value	12,848	12,807
Held-to-maturity securities, maturities less than 1 year	654	353
Held-to-maturity securities, maturities less than 1 year, fair value	653	352
Held-to-maturity securities, remaining maturities from 1-3 years	2,747	3,160
Held-to-maturity securities, remaining maturities from 1-3 years, fair value	2,749	3,166
Held-to-maturity securities, maturities from 1-90 days	497	2,243
Held-to-maturity securities, maturities from 1-90 days, fair value	497	2,244
Held-to-maturity securities, maturities from 91-360 days	1,199	1,699
Held-to-maturity securities, maturities from 91-360 days, fair value	1,201	1,703
Held-to-maturity securities, maturities over 360 days	798	1,048
Held-to-maturity securities, maturities over 360 days, fair value	800	1,050
Investments	18,743	21,310
Investments, fair value	18,748	21,322
Fair Value Inputs Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Mutual funds, fair value	12,848	12,807
Investments, fair value	12,848	12,807
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	653	352
Held-to-maturity securities, remaining maturities from 1-3 years, fair value	2,749	3,166
Held-to-maturity securities, maturities from 1-90 days, fair value	497	2,244
Held-to-maturity securities, maturities from 91-360 days, fair value	1,201	1,703
Held-to-maturity securities, maturities over 360 days, fair value	800	1,050
Investments, fair value	$ 5,900	$ 8,515

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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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